These rubber tourniquets use high quality rubber material tie belt and nylon fixed buckle combination, usually used in battlefield as first aid tool or gun strap , plays the hemostatic function. The tourniquet is about 135cm long and 2.5cm wide. The belt body is a semi-fusiform cross-sectional structure with a thick middle and thin sides and a single-sided convex arc. The thickest part in the middle is about 4mm. ,The surface is designed to increase the friction force. Made of high-quality rubber material, the material is solid, the single weight is about 130g, the rubber elasticity is moderate, there are 2 openings at one end, which are inserted into the buckle, and 5 openings at the other section, which are used for adjustment and fixation. Buckle is nylon material buckle