... a reliable method of stable ascent, descent and weight balance, gas springs (staydampers) are widely applied in automobile, ship, mechanical manufacture, textile ... products according to the samples, drawings,coupling forms, assembling sizes, supporting weight and relative parametersyou have provided. Menre No.Piston rod ... -800 150-120045100012 25 100-400 350-900 300-1500 Gas Springs (Stay Dampers)