China One Piece SellingBrand:TanseenMaterial:Rubber,Polycarbafil insideTooth Profiles:HTD5MPitch:5mmType:ClosedWidth:10mmLength:380mm,385mm,390mm,395mm,400mm,405mm,410mmHow to Caculate the Length of the Belts1.Know the type of your pulleys(X)2.Know the enamel of your pulleys(A,B)3.Know the gap between the 2 Shafts(C)4.Contact us to help you get the size