JBL CBT1K-ACC1 Flush-Mount Kit For CBT1000 Speaker (Black)This kit comes with two sets of MTC CBT FM3 flush mount wall brackets and a 1 piece MTC CBT OS3 offset bracket for installing the CBT1000 extender on top of the CBT1000 Line Array. This flush mount kit enables you to place your CBT1000 Line Array in the perfect spot for excellent acoustic projection of sound in any room, church, or conference hall that fits your needs. Features 2 sets of flush mount brackets 1 piece offset bracket for installing