JBL MR MUD-RING BRKT, C419(EA=6BKTS) - JBL-MTC-419MR

Optional Mud/Plaster?Ring Construction Bracket for Control 419CS/T, 440CS/T and 447HC; Installs before Sheetrock, Integral Ring Extension for Drywall Mudding, (Priced and sold as a pack of 6 pcs)