One used CPR SOCK-IT 4” Filter Sock Holder.

The CPR Sock-It Filter Sock Holder is a simple filter sock holder using a gasket and acrylic holder. Very simple and inexpensive way to add filtration to any of your 1″ outlets such as overflows and skimmer outlets.

FEATURES:
Mechanical filtration made easy.
Installs onto regular vertical wall and Euro-braced sumps.
Tinted body and adjustable bracket height (approx 2”).
Adjustable length inlet; extends for quieter and cleaner installation.
Requires vertical rims less than 1.25” thick and euro-bracing less than 0.50” thick.

Filter sock is not included.