3/SPC3150 Banded V-Belt 3.3/8" What does the S5M in

What does the S5M in 250-S5M-845 mean

Need a quote on 2/BX85

so a 1922V408 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

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3/SPC3150 Banded V-Belt 3.3/8" What does the S5M in3 SPC3150 Banded V Belt The 3 SPC3150 is a banded v belt from D&D Global's Dura Prime Band Metric Spc Series line. It installs as a standard section replacement on matching sheaves for industrial power transmission. Specification Value Part Number 3 SPC3150 Belt Type Banded V Belt Cross Section SPC Top Width 76. 2 mm Height Depth 18 mm Sheave Angle 40 Number of Bands 3 Length 3150 mm (Pitch Length) Construction Synthetic Rubber, Polyester Cord cord