Product Description：

A、cylinder: seamless steel pipe20#, Φ 15*1mm

B、piston rod: steel 45#, Φ 6mm

C、piston: brassH62, 

D、sealing parts: O-ring fluoro rubber, 

E、end fittings: PA66, 

F、gas: nitrogen,  

G、aircraft hydraulic oil ( still work well below 58°)

Features：

A、Up opening to 35°， the door free stop at every point. 
B、The opening angle can be adjustable up and down after assembly. 
C、Better for labor-saving 
D、Easy to disassemble
E、Compare with YS314-1 free stop whose end fittings are alloy and adjustable.

Product Advantages:

A、Pass SGS test over 100,000times, attenuation less than 10% after 100,000cycles
B、Finish: metallic paint, scratch resistance, NSS 8 grade/48h 
C、Different end fittings like YS611, YS612, YS616 for your chioce
D、aluminum frame and glass door is achieved

Product Parameters：

A、Application: for all up-opening door, still work well between -50°~ 80°

B、Installation conditions:

   a、different choice according to the door weight and door height
   b、over 600cm * 400cm, paired using is the best

Others (Packing and services)：

Package: 10pcs/inner box，100pcs/carton,N.W/G.W: 20kgs/20.5kgs 
MEAS: 34.5cm * 33.2cm * 29.5cm,                              
Delivery Date: Normally in one month     

Samples Preparation: samples can be sent in 3 working days (DHL 3-5days，UPS3-5days，Fedex/TNT 3-5days，EMS 7days reach destination )