This is a A-580K4 Micro-Rib V-Belt (58") PN: 580K4Main Description As Following : A-580K4 Micro-Rib V-Belt (58") P.N: 580K4 4 Rib X 58 K Micro Rib Polyester CordColor: BlackLength: 58Material: Polyester CordMetric Code: 4PK1473Number Of Ribs: 4Outside Length: 58.63"Pitch Length: 58"Thickness: 0.18Type: K Micro RibWidth: 4 Rib Crossed From: K040580 GATES , 4PK1473 A & I METRIC BELTS , 4040580 GOODYEAR , 5040580 DAYCO Found in Section & Models : Industrial Belts > K-Poly Belt, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : 4 Rib x 58" K Micro Rib Polyester Cord Color: Black Length: 58" Material: Polyester Cord Metric Code: 4PK1473 Number Of Ribs: 4 Outside Length: 58.63" Pitch Length: 58" Thickness: 0.18" Type: K Micro Rib Width: 4 Rib