Home / Garage Door Springs / Catnic / Westland Engineers Door Springs We stock the range of Catnic garage door springs including Catnic Extension Spring For Double Garage Doors, Catnic Extension Spring For Single Garage Doors, Catnic Garage Door Spring Box Assembley, Catnic MK3C Spring and Pulley Assembly and Catnic MK4 Spring. Orders over £14 include free delivery Catnic / Westland Engineers Garage Door Spring Box Assembly Catnic / Westland Engineering garage door spring box assembly contains two pre-tensioned springs, replacement cables, latch keeps, fixing screws and instructions. £94.00 each Catnic Extension Spring For Double Garage Doors To suit ''Double Retractable' and 'Double Canopy' garage doors 9 feet wide and over made by Catnic. £114.00 per pair Catnic Extension Spring For Single Garage Doors To suit 'Retractable' garage doors 9 feet wide and under made by Catnic. £114.00 per pair Catnic MK3C Spring and Pulley Assembly Catnic MK3C spring and pulley assembly supplied with pulley on one end to suit Catnic garage doors. £48.17 each Catnic MK4 Spring Catnic spring to suit a Catnic MK4 or Steel framed canopy garage door. £62.00 each Westland Extension Spring For Double Garage Doors To suit ''Double Retractable' and 'Double Canopy' garage doors 9 feet wide and over made by Westland Engineering. £114.00 per pair Westland Extension Spring For Single Garage Doors To suit 'Retractable' garage doors 9 feet wide and under made by Westland Engineering. £114.00 per pair Privacy Policy	Kingsley Garage Doors 11 Langthorne Ave Stevenage, Herts. SG1 3ND UK (Administration only) Tel. 0800 279 0725