Economic Double Action Floor Spring(1500) 
The floor spring has the following characteristics: 
1.Surface Paint: No painting peel  off   
2.We have passed five different test process(such as pressure-relieving processing) to prevent the oil spill.    Leak rate:0.3%      
3.Unpack Passed Rate:99%
4.We use the hydraulic oil with Anti-fire, Anti-burning, Anti-freezing,could be operated at –45℃                                                                                                
5.The main parts of the machine core have been done the heat treatment processing,it can prolong the working life.
6.Max door capacity:120kg   
7.Max door opening   angle:105 degree
8.Max door width&  height:1200mm×2300mm   
9.Dimension of appearance :304×152×49mm 
10.Lowest working temperature:–45℃
11.Tested  cycles:500,000 
12.Hold-open at 90degree(double action open floor  spring)