Thegas liftsis widely applied in the industries of automobiles. Parameters: 1.there are five parameters:extented length,sroke length,rod diameter,body diameter,force. 2.the parameters can be decided by buyers. Stroke length(mm) Extented length(studs) (mm) Rod diameter (mm) Body diameter (mm) Force range (N) 25-250 2×str+30mm 6 15 25N-400N 25-250 2×str+45mm 8 18 100N-800N 25-420 2×str+45mm 10 22 100N-1200N 25-420 2×str+45mm 12 22 100N-1600N 25-300 2×str+45mm 12 26 100N-1500N Packing and Delivery: packing details: 1.each one packed in a polybag. 2.the product number and the QTY printed on the carton. 3.as your request. delivery details: it's up to your quantity. Certification: GB/T19001-2000-ISO9001:2000 standard. Item Gurantee Life: Through more than 50,000 times recitprocating fatigue test. warranty:one year. Product Features: long lifespan.superior design.reasonable price.fast delivery.excellent painting surface.high quality.caution: Don't open,high compressure.