The tried and tested Laing DDC top...
This is a black sealing plugs with 1/4 inch external thread, which internal thread is screwed into a 1/4 inch and is particularly flat. To temporarily or permanently unneeded openings can be closed. Only 5 mm high.
This G1/4 Inch screw plug can be used for many applications. So you can use it for the radiator, reservoir and some other components.
This lighting module is designed to be screwed into the Cape Coolplex, Alutubes and other reservoirs.
Alphacool Eiszapfen pressure valve. A pressure valve for even more security in your system!