[:en]We have black and galvanized garage door spring and related different sizes of garage door spring fitting such as 1 3/4’’, 2’’, 2 5/8’’, 3 3/4’’, 5 1/4’’, 6’’. The material of garage door spring fitting is aluminum.
The spring mainly plays a balancing role, reducing the burden on the motor. The strength of the spring and the strength of the door are quite ideal.[:]
