








🔧 Upgrade your rig with the ultimate blend of style and strength!
The United Pacific 23399 Heavy-Duty Aluminum Gun Cylinder Air Valve Knob is a precision-engineered, screw-on valve knob made from lightweight yet durable aluminum. Featuring a triple chrome plating for a polished finish, it fits standard 1.91-inch NPT air valve connections on major truck brands like Freightliner, Kenworth, and Peterbilt. Designed for easy installation and built to last, this knob combines rugged functionality with standout style, backed by over 30 years of United Pacific’s trusted manufacturing expertise.










| Material | Aluminum |
| Brand | United Pacific |
| Item dimensions L x W x H | 5.5 x 3.55 x 2.15 inches |
| Exterior Finish | Machined |
| Inlet Connection Size | 1.91 Inches |
| Inlet Connection Type | National Pipe Tapered |
| Outlet Connection Type | NPT |
| Number of Ports | 1 |
| Outlet Connection Size | 1.91 Inches |
| Global Trade Identification Number | 00710270233991 |
| Manufacturer | United Pacific |
| UPC | 710270233991 |
| Model | 23399 |
| Item Weight | 9 ounces |
| Product Dimensions | 5.5 x 3.55 x 2.15 inches |
| Item model number | 23399 |
| Manufacturer Part Number | 23399 |
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