I.O.U./R GUS SET ORING by GUS MOD

a very usefull set of orings include

4 pieces 14 * 1 mm Viton brown for tank pmma in the to of refill

1 piece 12 * 1 mm mbr first o ring on the base

1 piece 13 * 1 mm viton second o ring on the base

1 piece 9 * 1 mm silicone fit on chimney

1 piece 13 * 1 mm mbr for pmma on threads