The Knipex 81 Series Plastic Pipe Grip Pliers are great for siphons, tube fittings and connectors up to 80mm diameter. They have 25 adjustment positions and a box-joint design with an ergonomic handle geometry. The fine adjustment is ideal for adjustment to diverse diameters. They have a robust, heavy-duty design and are made from forged chrome vanadium electric steel that has been oil-hardened with serrated gripping jaws. The handles are fitted with a non-slip plastic coating. Ideal for tightening and loosening siphon screw connections, plastic pipe fittings and round union nuts. Also for connectors and couplings with a screw connection, such as Cannon circular connectors and for gentle loosening of hoses on nozzles. 81 01 250 SB Black Atramentised Finish. 81 03 250 SB Chrome Finish. Specification Length 250mm. Adjustment Positions 25. Capacity 25-80mm. Weight 355g. Knipex 81 03 250 SB Plastic Pipe Grip Pliers have a Chrome finish.