specifications
1.force:unfixed
2.stroke:unfixed
3.length:unfixed
4.size:4mm*12mm,6mm*15mm,8mm*18mm,10mm*22mm,10mm*26mm,10mm*28mm

test   methods
1.mechanical    property    test
2.air    tight   performance    test
3.durability   test
4.corrosion    resistance    test
5.tensile    strength    test

advantages
1.silent   when   operating
2.aesthetic    design    can    decorate     your     place
3.100,000cycle    work    time
4.free    maintenance

please     don't     hesitate     to      contact     us!