Diffuser Bumpers

Diffuser Bumpers Aeration » Sweetwater Diffusers » To protect diffusers from abrasives like concrete or to protect a tank from abrasive diffusers. Use two diffuser bumpers for each diffuser. These oversized, heavy duty O-rings are made of Buna 70 for easy stretch over 11/2" square diffusers. Sold in packs of 10.