This sleeve accessory has been made to fit with 1500mm (5 foot) long 32mm diameter LED tubes. It will change the light colour of your T8 LED tube to a Mag-Magenta colour which is based on Rosco code 795 (allowing for easy colour matching). It is very simple to install start by removing your current LED tube sliding over the sleeve and Mag-Magenta coloured insert then reinstall the tube. Perfect for changing the way a space feels without the high cost of expensive colour changing fittings and installation fees. Please note that this product is suitable for 32mm diameter LED T8 tubes only and does not include end caps (not required). It comes as a clear sleeve with a coloured insert.