This sleeve accessory has been made to fit with 900mm (3 foot) long 32mm diameter LED tubes. It will change the light output to a Mag-Magenta colour which is based on Rosco code 795 (allowing for easy matching of colours). It is very simple to install simply remove your current LED tube slide over the sleeve and Mag-Magenta coloured insert then reinstall the tube. Perfect for changing the atmosphere of a space without the high cost of expensive colour changing fittings and electrician fees. Please note that this product is suitable for 32mm diameter LED tubes only and does not include end caps. It comes as a clear sleeve with a coloured insert.