A unique sealing structure is adopted, tightness, suitable for long-term use. Product Name: Pneumatic Compact Cylinder affordable price and quality assurance. Stroke: 5mm 10mm 15mm 20mm 25mm 30mm 35mm 40mm 45mm 50mm Manufactured from aluminium alloy and metal, with a reinforced cylinder body, high-quality sealed piston rods and imported grease., Manufacturer: CNfhFRY