Super Roll Up Door Spring , Rolling Shutter Spring For Roller Shutter Door

Product Features

Commodity Torsion spring
Place of Origin China (mainland)
Materials Steel (Mn)
Load type Torsion
Model number Torsion spring
Style Spiral
Usage Rolling door, Garage door , Industrial, Furniture
Surface treatment Oiled
Wire diameter ￠5mm-￠9mm
Outer diameter ￠78mm-￠110mm
Packing detail Inner packing with plastic bags+ carton boxes for outer packing+ wooden or plastic pallets
Delivery time 15-25Days
Payment terms 30%T/T,the balance70% should be paid before shipment
Price terms FOB, EXW,CFR
Supply ability 50,000 T/per year
Specification
(Normal) (d) 5.5*(OD)80*(NT)50(55,60,65,70,75,80)
(d) 6.5*(OD)80*(NT)50(55,60,65,70,75,80)
(d) 7 *(OD)85*(NT)50(55,60,65,70,75,80)
Remark : d=Wire diameter, OD=Outer diameter, NT=Total number of coils