Henderson Dolphin YELLOW Spring used on small, single garage doors. The original Henderson part number is 028570
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; Classic 7066/7070, Bergen tracked 7066/7070, Chevron tracked 7066/7070
Wire Diameter 5.5mm
Number of Coils 94
Overall Diameter 37mm
Length Excluding Hooks 525mm
When replacing garage springs, it is recommended to replace both springs at the same time, to ensure the spring tension and door remain balanced
