we can supply nitrogen gas springs Here are brief introduction of our company: Leading Manufacturer of gas springs and springs based in China, supply cabinet gas spring, bed support gas spring, lockabe gas spring ,Car supporting gas springs ,disc spring ,die spring,coil springs,etc. Custom make loking gas spring(flexlible loking type or rigid locking type),compression gas spring etc. 1:cylinder diameter:22mm or 26mm or 28mm 2:rod diameter:10mm or 12mm or 14mm 3:Stroke length:15mm to 400mm 4:F1 25N to 1200N Sample is free before order,welcome to visit our website