Measuring 600mm (2ft) in length this LED tube sleeve is ideal for changing the output of your light to a Primary Red colour. It is 32mm in diameter which is suitable for most brands of LED tube (please check your tube for suitability). Please note that the colour output which is noted as primary red is simply a descriptor. The official colour code of the coloured insert is 106 which can be researched to ensure that it is the particular shade of red required. Due to the products diameter (32mm) it will not fit T12 tubes and does not come with end caps. It is also important to note that this comes as a clear sleeve with a coloured plastic insert.