Caps for 24mm RDA  RDTA
Free     Myminifactory     L2740G2CG

Caps for 24mm RDA / RDTA

Should fit in any RDA tube with an outer diameter 24mm All you have to do is put an Oring in the trough ...

similar models —

Caps for 24mm RDA / RDTA alternatives
Pencil Cap
loewe98
Top cap for stem
Torben Frahm Petersen