1．The pitch and tooth shape of the double sided synch chronous  belt are identical to those of single sided synchronous belt.
2．Double sided synchronous belt can be classified into two standard models by the arrangements of the belt teeth .DA type double sided  synchronous belt with its teeth on both sides symmetrically arranged, see figure (a)DB type double sided synchronous belt withits teeth on both sides staggeringly arranged, see figure (b)

NOTE：we produce double sided synchronous belts of both symmetrical tooth (DA) and staggered tooth(DB) types, for special  specifications we can  process as per samples or designs provided by customers.