1.the cylinder is made of high quality cast iron . 2.Throught 500,000 times test 3.we have over 10 years experience.

Feature:l the scylinder is made of high quality cast iron .l provided with door stop function and explosion--proof device .

l max opening angle in each direction .l standard can be chosen .

l inside the frame:hight can be adjusted within 4mm ,width can be adjusted within 5mm between left and right length can be adjusted within 6mm.l suitable for wooden ,glass and aluminum ect,all kinds of doors .l it adopts low temperature anti-freezing hydraulic oil and the applicable ambient temperature can reach -30°C-+45°C .

Specifications:

  

Single Cylinder floor spring in China 6031 EN5#