... a factory,not a trading company D-8M industrial rubber timing belt 1,top rubber:(cr,HNBR) to protect the lining tensile member ... Industrial belts here.The types we have for the Neoprene(rubber) timing belt are as follows:MXL, XL, XXL, L, H, XH ... .4,Timing belts are 100% moulded by round moulds,or flat moulds and the belts sleeves are protected very well by ...