All our dial kits come with your choice of coloured backings - these extra films will colour co-ordinate the bits on your dash/interior that we dont cater for. All these films are self-adhesive on one side. Transparent is coloured but totally see-through Translucent is also coloured. It allows the light through and is slightly frosted. Diffuser - used to even out bright spots - especially useful where LEDs are used.