Are you looking for gas spring/hydraulic cylinder/damper? Our factory is specializing in producting gas spring.Can you tell more information about the gas spring you want? Like the tube diameter,rod diameter and piston length.If you have drawing ,pls send to me ,in order that i can know clear the goods specification and give you the best price. I will send you our measuring method ,you can mark your request like that . Hope can build the business relationship with you. Waiting for your reply soon. Best Regards, Hank Foshan Nanhai JIULI Precision Gas & Liquid Hardware Factory(gas spring factory-China) Email:andrew@china-gasspring.com Wechatï¼?008613794015178ï¼?whatsapp: 008618676547856