Henderson Dolphin GREY Garage Door Spring

When replacing garage springs, it is recommended to replace both springs at the same time, to ensure the spring tension and door remain balanced.
Henderson Dolphin GREY Spring used on most single and some double garage doors upto 13ft. The original Henderson part number is 028532
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; Dolphin 7066 to 8070, Double Dolphin 10'0" to 12'6", Merlin tracked 7'0 to 8,0", Doric tracked 7'0" to 8'0", Regent tracked 7'0" to 7'6", Sovereign 7066/7070, Warwick, Lincoln & Gloucester tracked 7066/7070 doors
Wire Diameter 5.6mm
Number of Coils 94
Overall Diameter 37mm
Length Excluding Hooks 530mm