One 5" I Block Type Flat Band Exhaust Clamp Replacement for Torca Easy Seal Style Flat Band Clamps Replaces: Heavy Duty Manufacturing: 20-500ES, Nelson (Boxed): 89528K, Nelson (Bulk): 89528B, Walker: 35975, Grand Rock: EZ-5SS, Donaldson: J000217, Riker: TEC-500 This listing is for one 5" I Block type flat band exhaust clamp, made from stainless steel. This is a replacement for Torca Easy Seal style flat band clamps. These are for use for lap joint connections, where an ID end (expanded and slotted) slips over an OD end (plain non-expanded end). It's not for use for butt joints where two OD ends butt up against each other. You need a butt joint clamp for that. Replaces: Heavy Duty Manufacturing: 20-500ES Nelson (Boxed): 89528K Nelson (Bulk): 89528B Walker: 35975 Grand Rock: EZ-5SS Donaldson: J000217 Riker: TEC-500