... variety of styles and sizes for customers and standard applications, Timing Pulley 1. Model: MXL, XL, L, H, XH, XXH, T2.5 ... , T5, T10, T20, AT5, AT10, AT20, 2M, 3M, 5M, 14M, S2M, S3M, S5M, S8M, S14M, 2GT, 3GT, 5GT, 8MGT ... with fast delivery and quality assurance. ---Rich experience in producing timing pulleys. ---Timing pulley with no noise, high efficiency, and free from maintainance.