O-ring Kits Kit:CR2100-2200 and use it to apply

and use it to apply torque to the tool when deep in an overflow box

Use silicon glue to be more permanent

They are then encased in PETG plastic for extra protection

Re-prints in a new color are also available at $10 each

O-ring Kits Kit:CR2100-2200 and use it to applyThese replacement O ring kits are for existing BAS customers who want to refresh their O rings, or who have broken or lost them. Typically O rings last a very long time, I'm still using ones I first put in to service in 2006. But they can get brittle with Ozone use, or accidentally lost or broken. Each kit contains a full set of O rings for the unit, plus extra black thumbscrews.