The BANSBACH Easylift gas spring is made from Type 316L stainless steel. Spring is filled with nitrogen (N2) for controlled pushing, and lifting or lowering without external energy. Temperature range: -22 to 176 F. This listing is for each. Technical Specification Item Gas Spring Type Standard Material Stainless Steel Force 20 lb Rod Thread Size M5 Locking No Rod Dia. 0.24 in Cylinder Dia. 0.59 in Fitting Type None Stroke 1.97 in Extended Length 5.04 in Compressed Length 3.07 in Fixed Resistance Yes Adjustable Resistance No