Measuring 1200mm (4 foot) in length this primary red coloured LED tube sleeve is ideal for adjusting your existing LED Tube. It is 32mm in diameter which is capable of fitting most brands of LED tube (please check your tube for suitability). The coloured insert which is noted as primary red has an official colour classification of 106 which can be researched to ensure that this particular shade is required. Due to the products odd diameter (32mm) it will not fit T12 fluorescent tubes and does not come with end caps. It is important to note that this comes as a clear sleeve with a separate coloured plastic insert.