★ Product Specifications – The Best Alternative Hardened Stainless-Steel Fixture for Gas Pump (Original) Hydraulic Jack Stay Strut Shocker Gas Pump in the Spring In a 9 inch length, a spring filled with hydraulic gas fluid is capable of lifting up to 15 kilograms. ★ Gas Strut Lift Support: Support opens lids to a maximum angle of 100 degrees. Lids soft open gently, Ideal for supporting the lid to keep it open.