Pferd 764251 Knot Cup Brush 2-3/4 (Package of 5) Pferd Sale! from 7900 /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. Knot Cup Brush, 2-3/4", PSF, .020 CS Wire, 5/8-11 Thread SKU:PFE 764251