Features: l Brand new and premium quality l The piston cylinder and the rod are made of stainless steel, which has good corrosion resistance l The internal wall is very smooth and has low resistance, which can be easily pulled by hand Specifications: l 3 Types: 55 mm travel, 75 mm travel, 90 mm travel l Color: Bright silver l Compatible with: the tube has 4 mm outer diameter, 2.5 mm inner diameter and the front and rear oil inlets thread of tube must be M5 l Main Material: Stainless steel l Outer Diameter: 16 mm l Inner Diameter: 12 mm l Suitable for: RC excavator bulldozer car, school experiment, miniature industry equipment Packing includes: 1 x Hydraulic Cylinder (PC)