I found this in another thread:
patrico1112 wrote:
The flat ones from a Subtank mini do fit. The dimensions from the ones in my spare bag are: one 20mm od 17 id 1.5 thick. One 18 mm od 15 id 1.5 mm thick. One 9mm od 7 id 1mm thick. One 15 mm id 13 od 1 mm thick.
eric1848 wrote:
one of the spare parts bag contain o-rings Black, Blue and Red 3set for glass tank as follow
Glass tank size OD ø21mm ID ø18.5mm height 18.1mm
glass tank O-ring upper OD ø19mm x1.5 SKU 4624902
bottom OD ø21mm x1.5 SKU 4624901
top cap O-ringOD ø15mm x1 SKU 4616905
OD ø7mm x1 SKU 4616912
M2.5 x3mm Headless screw SKU 3981606
1.3mm Allen key for M2.5 SKU 2284302
Edited on 8/24/2016 at 8:19 AM. Reason: