D&D Global 1400HK050 Timing Belt - HK Section, 1/2" Wide, 280T, 140in 4L Section The Gates PB12L075 PowerGrip Timing

The Gates PB12L075 PowerGrip Timing Pulleys is a synchronous timing belt with L-pitch profile

What does the S5M in 100-S5M-1270 mean

so a H belt runs only on H pulleys

com/s/files/1/0666/7721/products/Banded_Cogged_Belt_AX_BX_40ab62ca-bebb-4cf3-b785-c337813602a7

What is 12/C145 used for

D&D Global 1400HK050 Timing Belt - HK Section, 1/2" Wide, 280T, 140in 4L Section The Gates PB12L075 PowerGrip TimingThe D&D Global 1400HK050 is a synchronous timing belt with HK pitch profile, manufactured by D&D Global. Constructed with Neoprene body and aramid (kevlar) tensile cord for precise positioning and dependable synchronous power transmission. Specifications Pitch Profile HK Pitch 0. 5 in Tooth Location Single Side Number of Teeth 280 Length 140 in Material Neoprene Reinforcement Aramid (Kevlar) Color Black Temperature Range 30F to 185F