--- product_id: 1288439 title: "StratoFins Screw-on Water Rocket Fins - Compatible with 2 Liter Bottles or Smaller" brand: "relationshipware" price: "78.60 DT" currency: TND in_stock: true category: "Relationshipware" url: https://www.desertcart.tn/products/1288439-stratofins-screw-on-water-rocket-fins-compatible-with-2-liter store_origin: TN region: Tunisia --- # Fits 2L bottles & smaller No tools or glue needed 95% launcher compatibility StratoFins Screw-on Water Rocket Fins - Compatible with 2 Liter Bottles or Smaller **Brand:** relationshipware **Price:** 78.60 DT **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your water rocket game—screw, launch, and soar higher than ever! ## Quick Answers - **What is this?** StratoFins Screw-on Water Rocket Fins - Compatible with 2 Liter Bottles or Smaller by relationshipware - **How much does it cost?** 78.60 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/1288439-stratofins-screw-on-water-rocket-fins-compatible-with-2-liter) ## Best For - relationshipware enthusiasts ## Why This Product - Trusted relationshipware brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Attachment Styles:** Works seamlessly with cable ties, rubber stoppers, expanding tubes, nozzles, or O-rings—customize your rocket your way. - • **STEM-Approved Fun for All Ages:** Designed for ages 14 to 99, perfect for hands-on learning and outdoor adventure. - • **Effortless Assembly, Instant Flight:** Screw-on design requires zero tools or glue—get airborne in seconds. - • **Complete Kit for High-Flying Success:** Includes 3 aerodynamic fins, attachment ring, and easy instructions—everything you need to dominate the skies. - • **Universal Fit for Maximum Launch Power:** Compatible with 95% of all launchers, homemade or commercial—never miss a launch opportunity. ## Overview StratoFins Screw-on Water Rocket Fins are precision-engineered plastic fins compatible with 2-liter bottles or smaller, fitting 95% of launchers without tools or glue. This STEM-friendly kit includes three fins, an attachment ring, and instructions, enabling quick assembly and enhanced flight stability for outdoor water rocket enthusiasts aged 14 and up. ## Description desertcart.com: Relationshipware StratoFins Screw-on Water Rocket Fins - Compatible with 2 Liter Bottles or Smaller : Sports & Outdoors ## Features - Compatible with 95% of all available launchers either homemade or commercially available. - Works with various styles: cable ties, rubber stopper, expanding tube, nozzle, or O-ring. - No tools or glue required for assembly, simply screw-on to a 2 liter soda bottle or smaller. - Take your water rocketry to the next level of higher flights with screw-on StratoFins. - StratoFins kit includes 1 attachment ring and 3 fins along with an instruction sheet. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00BA3K0WY | | Age Range Description | 14 - 99 years | | Best Sellers Rank | #87,312 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1,719 in Water Bottle Accessories | | Brand Name | Relationshipware | | Color | Red | | Customer Reviews | 4.5 4.5 out of 5 stars (542) | | Educational Objective | STEM | | Indoor Outdoor Usage | Outdoor | | Item Dimensions | 7.5 x 5.12 x 1.75 inches | | Item Weight | 1 ounces | | Manufacturer | Relationshipware | | Manufacturer Part Number | FIN-1 | | Manufacturer recommended age | 14 years and up | | Material Type | Plastic | | Model Number | FIN-1 | | Number of Packs | 1 | | Number of Players | 1 | | Operation Mode | Manual | | Set Name | 1 | | Size | Medium | | Theme | Rocket | | UPC | 700220318885 | ## Images ![StratoFins Screw-on Water Rocket Fins - Compatible with 2 Liter Bottles or Smaller - Image 1](https://m.media-amazon.com/images/I/51-HQenGsQL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: what is the internal diameter of the red threaded end of the assembly? Is it the same as the internal diameter of the threaded 2L bottle opening?** A: This answer is coming from Dallas Murdoch, Owner of EZ-Launch LLC and a dealer for the red fins. The internal portion of the top half of the red fin assembly is threaded and screws onto the launch bottle. Its diameter is 29.6 mm. The internal diameter of the threaded opening on a two liter launch bottle is 21.0 mm. The internal diameter of the lower 1/2 of the fin assembly is 21.3 mm. The internal diameter of the pop bottle where the external threads are located is 21.1 mm. If you are using an EZ-Launch bottle rocket launcher with the red booster fins, you need to have a round white ABS plastic insert glued to the lower threaded portion of the red booster fins. This comes with the booster fins when ordered from EZ-launch.com and is necessary to lock the bottle with the fins into the EZ-Launch bottle rocket launcher. Also, The red booster fin assembly requires a separate black launch pipe in order for the bottle to maintain a steady air pressure and hold the water inside of the bottle. This also is included in the EZ-Launch bottle rocket booster kit that comes from EZ-Launch LLC. **Q: Why do these required using an additional nose cone?** A: the additional nose cone improves aerodynamics and is where the parachute is placed for launch **Q: What type of plastic is this product made with, my son has sensitivities.** A: The StratoFins are made from polypropylene (PP), which is the same plastic on the white cover of a Tic Tac Mint container that has the "living hinge." **Q: Like the nose cone idea. Anybody use a mylar parachute?** A: We have no experience with using mylar for a parachute, but that sounds like an interesting idea. It should be durable and lightweight, which might make a great choice for material. The only issue might be how well it drapes, since it could be somewhat stiff although you could pre-wrinkle it. Plastic trash bag work for parachutes and mylar wouldn't be too much different from that of than draping. We use rip-stop nylon for our parachutes, which is very durable with great longevity. If you are using it on a water rocket, watch the video link if you haven't seen it already. It will help explain attaching it to a 2-liter soda bottle and offer deployment techniques. ## Frequently Bought Together - StratoFins Screw-on Water Rocket Fins - Compatible with 2 Liter Bottles or Smaller - Relationshipware StratoChute 24" Red Rip-Stop Nylon Parachute for Water or Model Rocket --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/1288439-stratofins-screw-on-water-rocket-fins-compatible-with-2-liter](https://www.desertcart.tn/products/1288439-stratofins-screw-on-water-rocket-fins-compatible-with-2-liter) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-09*