General description Brand new inner tubes designed for durability and quality. These tubes feature a straight metal valve stem and are suitable for various mini moto applications. Technical specifications Size: 3.50 / 4.00-6 Valve Stem Style: TR13 Valve Stem Length: approximately 3.5 cm / 1.38 inch Material: Rubber Measurement allowed error: +/- 1-3 cm Compatibility and accessories Compatible with 3.50 / 4.00-6 tires Reference brands: BMX, Fly, Hi-Bird, JCL, Linhai, Loncin, Sunl, Tank, United Motors Usage Check the size before purchasing to ensure compatibility. Other information Package includes: 6 x Inner Tubes Note: Light reflection and different displays may cause the color of the item to differ slightly from the real thing.