Product description:Cylinder finishing : Autophoretic Rod finishing : Nitriding process Cylinder diameter : 18 / 22 / 25 / 27 Travel pole diameter : 8 / 10 / 12 / 10 , 12 , 14 , 16 L (Install distance): According to customer’s requirement S ( stroke length ) : According to customer’s requirement End fitting form : According to customer’s requirement Pressure : 100 N- 2500 N ( 10 KG-256 KG) Brief introduction:Damper will change its force in accordance with piston rod’s extended or compressed speed, when piston rod run fast, damper’s force will increase obviously, making the subject run smooth and softly. But when piston rod run slow, there is little force happened. Damper is mainly used into washing machine, refrigerator and so on. Packing:A , 1 piece in a plastic bag . 10-30 pieces/carton. B , as customers 's requirement . Our advantage:1, We have engaged in automobile gas spring producing for 7 years . now , our products branch into more wider fields and still keep the high quality as usual . 2, We have a professional R & D team and own several patented products . If you have any problem in technology of gas spring , please contact us without any hesitation , we will provide the perfect service to you . 3, It is only 50 minutes range of driving from our factory to Shanghai Pudong International Airport , Welcome you to take a visit and cooperate with us.