Henderson Dolphin GREEN Spring used on most double garage doors. The original Henderson part number is 028563
When replacing garage door springs, it is recommended to replace both springs at the same time, to ensure the spring tension and door remain balanced.
Henderson Dolphin springs were all manufactured to the same dimensions, but using a different grade of metal to achieve the difference in spring strength. Usually the Dolphin springs were identified by their colour.
Suits the following door styles; double Dolphin 12’6″ to 14’6″ and Doric tracked 8’0″ to 9’0″ wide doors.
Wire Diameter 5.7mm
Number of Coils 94
Overall Diameter 39mm
Length Excluding Hooks 535mm
