D&D Global 1141K12 Micro-V Serpentine Belt - K Section, 12 Ribs, 1141mm TL3535 What does the 5M in

What does the 5M in 1150-5M-09 mean

"sku":"1133K12-D&D"

com/products/gates-3mr-28s-06-powergrip-gt-timing-sprocket"

"name":"D&D Global 11/C106 V-Belt - C Section

"mpn":"TB037256183140"

D&D Global 1141K12 Micro-V Serpentine Belt - K Section, 12 Ribs, 1141mm TL3535 What does the 5M inThe D&D Global 1141K12 is a Micro V (multi ribbed) belt with Micro V ribbed K section dimensions, manufactured by D&D Global. Micro V belts deliver smooth, quiet operation with high power capacity in a compact cross section, ideal for serpentine and multi accessory drive systems. Constructed with Neoprene body compound and aramid (kevlar) tensile members for reliable power transmission and long service life. Specifications Belt Section K Belt Type