The pitch & tooth type of double sided timing belt is same as synchronous belt. There are Rubber double-sided timing belts and PU double-sided timing belts, according to the difference of material.
 
There are two kinds of double sided timing belt:
DA type: symmetrical arrangement  
DB type: staggered arrangement  
Remark: We can produce DA & DB two kinds of double-sided timing belt for particular specification, we can also make production according to client's drawing or sample.