2 pairs of plastic inserts 1C for 81 11 250 / 81 13 250. Suitable for siphons, oil filters, plastic pipes, and connections with a diameter of up to 80 mm. Features fine adjustment for ideal fitting to various diameters. Robust and durable, these inserts are perfect for tightening and loosening siphon screw connections, plastic pipe connections, and round nuts. They are also designed for connections and couplings with screw connections, such as Cannon round connectors. Ideal for gently loosening hoses on nozzles and filter cartridges. The product includes a 25-fold adjustable box joint with capacities for half-moons, square millimeters, square drives, stepped squares, triangles, and various clamping widths, including hexagonal, round, and square.