PIX 7/SPA2100 Industrial V-Belt Double "name": "What does the AT5US

"name": "What does the AT5US in 100AT5/1500US mean

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so the 21/3V750 interchanges with Gates 21/3V750

The Gates 700XXH400 PowerGrip Timing Belts 92575300 is a synchronous timing belt with XXH-pitch profile

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PIX 7/SPA2100 Industrial V-Belt Double "name": "What does the AT5USThe PIX 7 SPA2100 Industrial V Belt is a banded V belt featuring Metric SPA (13mm) dimensions, manufactured by PIX. This belt features multiple strands joined by a common backing for heavy duty applications requiring extra stability and load capacity. Constructed with Neoprene body compound and polyester cord tensile members for reliable power transmission and long service life. Specifications Belt Section SPA Sub Type Banded Width 13mm Thickness 10mm