China One Piece SellingBrand:TanseenMaterial:Rubber,Polycarbafil insideTooth Profiles:HTD5MPitch:5mmType:ClosedWidth:10mmLength:1135mm,1140mm,1145mm,1150mm,1160mm,1175mm,1180mmHow to Caculate the Length of the Belts1.Know the kind of your pulleys(X)2.Know the enamel of your pulleys(A,B)3.Know the space between the two Shafts(C)4.Contact us that can assist you get the length