Add to Cart Quick view Gum GUM Proxabrush Go-Betweens Refill (Butler) $18.38 GUM Proxabrush Go-Betweens Refill -Tight, Tapered Interdental Brush, Box of 36 Brushes (2/Pk, 18 Pk/Box). Refill Brush Only. Replaceable heads for interproximal tooth cleaning, have bristles... $18.38 Add to Cart Quick view