This is a A-555K12 Micro-Rib V-Belt (55.5") PN: 555K12Main Description As Following : A-555K12 Micro-Rib V-Belt (55.5") P.N: 555K12 12 Rib X 55.5 K Micro Rib Polyester CordColor: BlackLength: 55.5Material: Polyester CordMetric Code: 12PK1410Number Of Ribs: 12Outside Length: 56.25"Pitch Length: 55.5"Thickness: 0.18Type: K Micro RibWidth: 12 Rib Crossed From: K120555 GATES , 12PK1409 A & I METRIC BELTS , 4120555 GOODYEAR , 5120555 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 55.5" K Micro Rib Polyester Cord Color: Black Length: 55.5" Material: Polyester Cord Metric Code: 12PK1410 Number Of Ribs: 12 Outside Length: 56.25" Pitch Length: 55.5" Thickness: 0.18" Type: K Micro Rib Width: 12 Rib