This is a A-520K8 Micro-Rib V-Belt (52") PN: 520K8Main Description As Following : A-520K8 Micro-Rib V-Belt (52") P.N: 520K8 8 Rib X 52 K Micro Rib Polyester CordColor: BlackLength: 52Material: Polyester CordMetric Code: 8PK1321Number Of Ribs: 8Outside Length: 52.63"Pitch Length: 52"Thickness: 0.18Type: K Micro RibWidth: 8 Rib Crossed From: K080520 GATES , 4080520 GOODYEAR , 5080520 DAYCO , 8PK1320 A & I METRIC BELTS Found in Section & Models : Cooling Systems > Belts: Alt, Fan, Steering, Water Pump, Case-IH TRACTOR: FARMALL 65C (Main Drive 2015> 1325mm), Case-IH TRACTOR: FARMALL 75C (Main Drive 2014> 1325mm), Industrial Belts > K-Poly Belt, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : 8 Rib X 52" K Micro Rib Polyester Cord Color: Black Length: 52" Material: Polyester Cord Metric Code: 8PK1321 Number Of Ribs: 8 Outside Length: 52.63" Pitch Length: 52" Thickness: 0.18" Type: K Micro Rib Width: 8 Rib