Is it really 4:1 ratio because inside the box on the tubing is written 3:1

Hi, Yes, this specific ASIN is for the 4:1 ratio. The 3:1 is listed on a different ASIN.

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Wirefy 190 PCS Heat Shrink Tubing Kit - 4:1 Dual Wall Tube - Adhesive Lined - Marine Shrink Tubing - Black, Red

Wirefy 190 PCS Heat Shrink Tubing Kit - 4:1 Dual Wall Tube - Adhesive Lined - Marine Shrink Tubing - Black, Red

Product ID: 450231283

Details

Brand
Wirefy
Material
Polyolefin
Number of Packs
190
Product dimensions
44L x 44W
Recommended uses for product
Electrical

💧Adhesive-lined for waterproof seal

🔥4:1 shrink ratio for max versatility

🛠️190 pcs in 5 sizes, ready to use

Description

🔥 Seal it tight, protect it right — the pro’s choice for flawless wiring!

ALL IN ONE KIT - 190 pre-cut tubes in 5 essential diameters for any project, from marine to home repairs.
DUAL WALL DURABILITY - Outer abrasion-resistant layer plus inner adhesive for strain relief and long-lasting protection.
EFFORTLESS PRO FINISH - Simply slide on, heat, and seal—perfect for pros and DIYers craving flawless results.
ULTIMATE SHRINK POWER - 4:1 shrink ratio ensures a snug, professional fit on varied wire sizes.
WATERPROOF CONFIDENCE - Heat-activated adhesive creates a durable, moisture-proof seal every time.

Wirefy’s 190-piece heat shrink tubing kit features a market-leading 4:1 shrink ratio and dual-wall construction with adhesive lining for waterproof, abrasion-resistant insulation. Pre-cut tubes in five common sizes make it easy to achieve professional-grade electrical protection across marine, automotive, and home projects.

Specifications

ASIN	B09NW7954L
Best Sellers Rank	47,174 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 193 in Heat-Shrink Tubing
Brand	Wirefy
Customer Reviews	4.7 4.7 out of 5 stars (1,253)
Item Dimensions L x W	44L x 44W millimetres
Item Length	1.75 Inches
Item Weight	0.57 Pounds
Manufacturer	Wirefy
Material	Polyolefin
Model Number	Wirefy-DW41-190-B-R
Number of Items	1
Number of Packs	190
Part Number	Wirefy-DW41-190-B-R
Recommended Uses For Product	Electrical insulation, moisture protection, fire resistance
UPC	850026973464
Unit Count	190.0 count

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