HAVIS's C-EB45-SPK-1P one-piece equipment mounting bracket, 4.5 in mounting space for radio speaker mounting. Works with Motorola radio speaker without plastic housing or any similar 4.5 in speaker that accepts a 3.5 in x 3.5 in mounting hole pattern. Fits Motorola HSN4018, HSN4031B, and HSN4032 with plastic housing removed.