An LED T8 tube sleeve designed for your existing 4 foot (1200mm) tubes in order to change the colour output to a Peacock blue colour. The Rosco colour code for this shade of blue is 115 making it possible to match up to existing sleeves when needed. The overall diameter of this sleeve is 32mm which is capable of fitting most brands of T8 LED tube (please check that yours are compatible). To install the sleeve first remove your LED tube and slide both the coloured insert and the clear sleeve over the top to hold it all together. This simple product can save large amounts of money vs expensive dedicated colour changing products. Please note that this product is not suitable for T8 / T12 fluorescent tubes and can only be used with LED tubes.