hi
welcome 2 germany
there is another topic "for american customers": "hi"
we work on a way to ship to the us. but now our answers:
"deckelplatte":this is the aquatube without "deckelplatte".
and this is the aquatube with "deckelplatte". the aquatube does better fit in your case.
"deckel" means the top of ur case.
the "Ausgleichsbehälter Eheim 1046/1048 aus Plexiglas" doesn´t have any "deckelplatte" its positions is not the top of the case, its the front of the pump.
gf4:

do you see the "steelplate" in the middle of the cooler?
between the copper and "plexiglas". we are working on a gf4 solution. we only need a new steelplate.
for "watercooling installations questions" see this:
http://forum.aqua-computer.de/index.php?page=Thread&threadID=0
dino