O-Ring for the 10“ Reverse Osmosis Canister.  This o-ring may or may not fit in all 10″ canisters due to manufacturing differences.

Three Sizes Available:

• Wrench for 10″ 2.5″ Canisters – most common
• Wrench for 10″ x 4.25″ and 20″ x 4.25″ (Big Blue) Canisters