This is a A-559K6 Micro-Rib V-Belt (55.9") PN: 559K6Main Description As Following : A-559K6 Micro-Rib V-Belt (55.9") P.N: 559K6 6 Rib X 55.9 K Micro Rib Polyester CordColor: BlackLength: 55.9Material: Polyester CordMetric Code: 6PK1420Number Of Ribs: 6Outside Length: 56.53"Pitch Length: 55.9"Thickness: 0.18Type: K Micro RibWidth: 6 Rib Crossed From: K060559 GATES , 25060559 , , 4060559 GOODYEAR , 5060559 DAYCO , 6PK1419 A & I METRIC BELTS , 6PK1420 A & I METRIC BELTS , 6PK1421 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 : 6 Rib X 55.9" K Micro Rib Polyester Cord Color: Black Length: 55.9" Material: Polyester Cord Metric Code: 6PK1420 Number Of Ribs: 6 Outside Length: 56.53" Pitch Length: 55.9" Thickness: 0.18" Type: K Micro Rib Width: 6 Rib