We have springs for Dolphin, Doric, Merlin and Ultra models in stock!
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Henderson Garage Door Springs & Spares
Springs for the Henderson, Dolphin and Ultra Range of Garage Doors
Spring Strength - The Dolphin Range of Springs
Yellow Spring - weakest
Grey Spring
Green Spring is the strongest
| Henderson Springs | The length of spring over the coils | Number of Coils | Spring Diameter | Wire Diameter | General Information |
| Yellow | 533mm / 21" | 99 | 38mm | 5mm | used on single doors |
| Grey | 533mm / 21" | 99 | 38mm | 5.5mm | Used on doors upto 12' wide |
| Green | 533mm / 21" | 99 | 38mm | 6.0mm | Used on double doors |
| Ultra 150 Mk1 | 521mm / 20.5" | 82 | 47mm | 6.5mm | Hexagonal head adjuster bolt is used |
| Ultra 150 Mk2 | 424mm / 16.6" | 63 | 54mm | 7mm | Hook adjuster bolt is used |
| Ultra 210 | 603mm / 23.7" | 86 | 49mm | 7mm | Hexagonal head adjuster bolt used |
| Ultra 225 Mk2 | 516mm / 20.3" | 62 | 64mm | 8.6mm | Hook adjuster bolt used |
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