*** JMA OFFER A PREMIUM A+PRODUCTS FOR LESS THAN OTHER COMPANIES*** JMA HYDRAULIC MAIN PIN THUMB FIT 3 - 5 TONS MINI EXCAVATOR OR SIMILAR MACHINE (PINS ARE INCLUDED) Weight: 407.86 lbs. MASTER MAIN PIN: 40 mm Fits Similar Machine: Caterpillar CAT 303, 304, 304 E2 or Similar Machine 3 -5 Tons STOCK NUMBER (CATHYTHUM40) The Best Attachments in the Market at The Right Price Like: Excavator Heavy Duty Rock Bucket. Excavator Hydraulic Hammer.. Plate Compactor. Manual Thumbs 1 - 45 Tons Machine. Hydraulic thumb 1 - 45 Tons Machine. Hydraulic Piping Kit. Hydraulic Quick Couplers. Skid Steer Hydraulic Hammer Skid Steer Heavy Duty Bucket Our Products Will Fit Caterpillar, John Deere, Komatsu, Kubota, JCB, Volvo, Sany and Much more.