PerformancePro ArtesianPRO Seal Kits Sinking Screws are fully embedded in

Screws are fully embedded in large and strong screw pockets

4" Up to 20 gallons R440371 788379311728 Large 9

The second part of these kits is the AlphaONE filter media

EasyPro Pro-Glass Alumina Air Stores produce finer bubbles and are 3 times stronger than white silica air stones

self-contained water features or ponds without conventional filtration

PerformancePro ArtesianPRO Seal Kits Sinking Screws are fully embedded inPerformancePro ArtesianPro Seal Kit (AP SK1) includes the following: (2) Drain Plug O Rings (1) Lid O Ring (ABL 3 30) (1) Diffuser O Ring (APD 06) (1) Bracket O Ring (APO 3 20) (1) Bracket Bore O Ring (PBO 10) (1) Freshwater Mechanical Seal (MPS 513) OR (1) Saltwater Mechanical Seal (MPS 517) (1) Reverse Set Screw Washer