This is a A-559K12 Micro-Rib V-Belt (55.9") PN: 559K12Main Description As Following : A-559K12 Micro-Rib V-Belt (55.9") P.N: 559K12 12 Rib X 55.9 K Micro Rib Polyester CordColor: BlackLength: 55.9Material: Polyester CordMetric Code: 12PK1420Number Of Ribs: 12Outside Length: 56.53"Pitch Length: 55.9"Thickness: 0.18Type: K Micro RibWidth: 12 Rib Crossed From: GATK120559 , , K120559 GATES , 12PK1417 A & I METRIC BELTS , 12PK1418 A & I METRIC BELTS , 12PK1419 A & I METRIC BELTS , 12PK1420 A & I METRIC BELTS , 12PK1421 A & I METRIC BELTS , 25120559 , , 4120559 GOODYEAR , 5120559 DAYCO Found in Section & Models : Industrial Belts > K-Poly Belt, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : 12 Rib X 55.9" K Micro Rib Polyester Cord Color: Black Length: 55.9" Material: Polyester Cord Metric Code: 12PK1420 Number Of Ribs: 12 Outside Length: 56.53" Pitch Length: 55.9" Thickness: 0.18" Type: K Micro Rib Width: 12 Rib