2 sets of 4 wires (8 Wires total) twisted LED Wires for the newest Heng Long TK6.0 TK6.1, TK 7.0 and TK 7.1 plugs, wires are around 14” in Length with the twist, should be long enough to reach the Front and Red LEDS in most 1/16 Heng Long tanks.
You will need the tools and knowledge for correct installation of this. May need this entire set of 8 for a full rewire.