Klir - 4" Flow-Diverting Cap Klir Sale! from 1599 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Klir 4" Flow-Diverting Cap This optional Klir Flow Diverter to cap the unused holes of your sock tray. You can easily dial it to divert excess flow or to filter less aggressively.