The reserovir cover is made of aluminum alloy.
Aluminum alloy is in a stable state and will NOT chemically react with copper or brass.
So aluminum alloy cover and copper radiator/block works normally in the same cooling system, do not affect each other, please feel free to use.
Reservoir diameter: 50 mm
Whole Length: 150/200/260 mm
Material: aluminum alloy + acrylic
Reservoir * 1
O-bracket * 2
L-bracket * 2
Plugs * 2
Bracket screw set * 1