YOUQI DHS wiper seals are polyurethane‑made oil seals for cylinder sealing. Available in blue, green or customer‑specified colors, they serve as dual‑purpose dust‑proof and oil‑retaining seals. Suitable for working media including hydraulic oil, liquid and gas. Standard sizes are in stock, meanwhile custom dimensions are supported to fit diverse operating requirements. Manufactured in Shanghai, China. These DHS wiper rings effectively block dust and impurities from entering cylinder systems and prevent medium leakage. Featuring good elasticity and wear resistance, they deliver stable sealing performance for long‑time pneumatic cylinder operation. Custom samples are available upon request.