... &Heat resistance We are factory ,not a trading companyD-14M double sided timing belt1,top rubber:(cr,HNBR) to ... for the Neoprene(rubber) timing belt are as follows:MXL, XL, XXL, L, H, XH, XXH, T2.5, T5, ... T10, T20, AT5, AT10, 2M, 3M, 5M, 8M, 14M, 20M, S2M, S2.1M, S3M, S4.5M, S5M, S8M, S14M ... 0086-576-83373128 Skype;thegreatwallbelt01 thegreatwallbelt03nancy wang D-14M double sided timing belt