r kit, traditional fluorescent tubes can be replaced with the Classic Led EHEIM. This pack fits T5 tubes with a diameter of 166 mm and T8 tubes with a diameter of 26 mm. The original sockets of the tubes are then used as a simple support for the classic LED ramp. The various mounting brackets allow individual mounting under or next to the sockets. The brackets themselves can be moved on the LED rail. The set contains all the parts needed to assemble a Classic LED EHEIM.