A grey Henderson Dolphin garage door spring to suit 7ft 6'6" to 8ft 7" wide single Dolphin doors and 10ft to 12ft 6" double Dolphin garage doors. It is also suitable for a range of other garage doors including: Ultra 100 gear, some pre-Premiere single Merlin doors, Doric, Gloucester, Lincoln, Regent, Sovereign and Warwick garage doors.
 
Details: The number of coils is 99 with a length over coils of 21 inches and a spring diameter of 1 1/2 inches.