Zaptex Buckle Tourniquet First Aid Quick Release Medical Emergency Pack of 5 Buckle Tourniquet. Have a fun shopping experience with Zaptex. MATERIAL - Elastic bands, ABS plastic parts. SIZE - 17.7*1 inch,compact size quick release tourniquet. FUNCTION - Medical tourniquet.For human venous blood specimen collection process or intravenous infusion, transfusion, blood venipuncture. PACKAGE - Pack of 5*tourniquet , Zaptex guarantees you quality items.