Material:TPU Thickness: about 0.2MM Color: Brown, purple, pink French Valve: 45mm(1.77in),65mm(2.56in),85mm(3.35in) Weight: 700X23-32 about 35g /700X33-50 about 46g Packing: 1 piece of 1pc inner tube +1pc manual +1pc wiping tablet +1pc tire patch Note: Weight for reference only! No actual weighing! Tire patch can be used temporarily for urgent tire repair, if the damage is out of range can not be repaired Description: Where there is life, there is movement. With the continuous improvement of living standards, today's bicycle is not only a means of transportation, but also a collection of sports, leisure, racing, and hobbies TPU ( Thermoplastic polyurethanes) is a rubber called Thermoplastic polyurethane elastomer. It is mainly Polyether type. It has a wide hardness range (60HA-85HD),wear resistance, oil resistance, transparency and good elasticity. It is widely used in daily necessities, sporting goods, toys, decorative materials and other fields. TPU raw materials are used for bicycle inner tubes, and it is also a popular new material in recent years, because halogen-free flame retardant TPU can also replace soft PVC and rubber to meet the environmental protection requirements of more and more fields.