Brand:TanseenMaterial:Rubber,Polycarbafil insideTooth Profiles:MXLPitch:2.032mmType:ClosedWidth:6mm,10mm,12mm,15mm,20mmLength:B592MXL,B612MXL,B648MXL,B652MXLHow to Caculate the Length of the Belts1.Know the kind of your pulleys(X)2.Know the tooth of your pulleys(A,B)3.Know the distance between the two Shafts(C)4.Contact us to help you get the length