Bosch SBB-R Surface backbox 5.5x5.6x3.6 inch red F.01U.002.284

Back box for surface mounting speakers, chimes and electronic applications Has one 1.9 cm (0.75 in.) and one 1.3 cm (0.5 in.) knockout on each side Supports up to eight conductors from AWG 18 to AWG 12 (ISO 0.75 mm2 to 4 mm2) Works with Wheelock 43T, AMT, CH70, ET70, ET-1080, HS, HS4, MB, MT, and RSS devices Color Red Dimensions (H x W x D) (mm) 140 x 142 x 91 mm Mounting type Surface-mounted