This is a A-510K7 Micro-Rib V-Belt (51") PN: 510K7Main Description As Following : A-510K7 Micro-Rib V-Belt (51") P.N: 510K7 7 Rib X 51 K Micro Rib Polyester CordColor: BlackLength: 51Material: Polyester CordMetric Code: 7PK1295Number Of Ribs: 7Outside Length: 51.63"Pitch Length: 51"Thickness: 0.18Type: K Micro RibWidth: 7 Rib Crossed From: K070510 GATES , 4070510 GOODYEAR , 5070510 DAYCO , 7PK1295 A & I METRIC BELTS Found in Section & Models : Industrial Belts > K-Poly Belt, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : 7 Rib X 51" K Micro Rib Polyester Cord Color: Black Length: 51" Material: Polyester Cord Metric Code: 7PK1295 Number Of Ribs: 7 Outside Length: 51.63" Pitch Length: 51" Thickness: 0.18" Type: K Micro Rib Width: 7 Rib