JBL MR MUD RING BRKT, C447(EA=6BKTS) - JBL-MTC-447MR

Optional Mud/Plaster?Ring Construction Bracket for Control 418C/T, 447C/T and 447LP; Installs before Sheetrock, Integral Ring Extension for Drywall Mudding, (Priced and sold as a pack of 6 pcs)