The Kettle Screen is an all stainless steel adapter that turns a kettle into a mash tun. Use it in your brew pot to help filter out trub from your wort. It is 12.5 long with a 3/8" male NPT fitting.
The 3/8" NPT Kettle Screen fits perfectly with the KettleValve / Ball Valve (1/2"), but is not necessary. If you are using 1/2" NPT fittings on your kettle you will need the 1/2" NPT Kettle Screen.