Grease Cutter Head Type Chain Knocker Compatible Cleaner Series M18 Sectional Machines Connection Size 1 1/4 in Maximum Drain Line Inside Diameter 4 in Minimum Drain Line Inside Diameter 3 in Product Type Chain Knockers Compatible Cleaner Manufacturer Part Number 2871-20 Application Sectional Machine Cables Compatible Cable Core Type Open Wind Compatible Cleaner Grainger Part Number 55NJ55 Cutter Length 3 in Cutter Type Grease Cutter Features RUST GUARD Plating For Use With 55NJ55