Garador Mk4 and F-Type Spring FinderNeil Harper2026-01-14T12:37:58+00:00 Garador Mk4 and F-Type Spring Finder Simply select your garage door details below to find the correct spring code from the table. Door Type: Select Type Steel Timber GRP Door Style: Select Style Width: Select Width Height: Select Height Select your door details to see the required spring. Select the genuine or pattern spring Spring Code Genuine Spring Pattern Spring 4-401 GAS3000 GAS3050 4-402 GAS3010 GAS3060 4-404 GAS3020 GAS3070 4-405 GAS3030 GAS3080 4-407 GAS3040 GAS3090 Download Full Spring Chart (PDF)