Product specification:Cylinder finishing : Autophoretic Rod finishing : Nitriding process Cylinder diameter : 18 /22 / 25 /27 mm Travel pole diameter : 8 / 10 / 12 / 10,12 mm L (Install distance Center distance ): According to customer's requirement S ( stroke length ) : According to customer's requirement End fitting form : According to customer's requirement Pressure : 30 N - 1200 N ( 3 KG- 122 KG) Brief usage introduction: This kind of gas spring can be widely used in bus seat, aircraft seat, medical equipment, home furniture, fitness equipment and massage chair and so on. It can adjust the angle of the seat back andbe blocked at any position. 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.