This is a A-520J4 Micro-Rib V-Belt (52.0") PN: 520J4Main Description As Following : A-520J4 Micro-Rib V-Belt (52.0") P.N: 520J4 4 Rib X 52 J Micro Rib Polyester CordColor: BlackLength: 52Material: Polyester CordMaximum Ribs: 220Metric Code: 4PJ1321Number Of Ribs: 4Pitch Length: 52.0"Thickness: 0.16Type: J Micro RibWidth: 4 Rib Crossed From: 4PJ1321 A & I METRIC BELTS Found in Section & Models : Industrial Belts > J-Poly Belt, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : 4 Rib x 52" J Micro Rib Polyester Cord Color: Black Length: 52" Material: Polyester Cord Maximum Ribs: 220 Metric Code: 4PJ1321 Number Of Ribs: 4 Pitch Length: 52.0" Thickness: 0.16" Type: J Micro Rib Width: 4 Rib