The Extron SMB 200 Series Low Profile Surface Mount Boxes feature a compact, sleek appearance that compliments Extron control products with L-Series lectern style faceplates. The SMB 203 L is for use with 6.5" (16.5 cm) wide, lectern faceplates and products, including the MLC 104 IP Plus L and MLC 226 IP L. The SMB 205 L is for use with 10" (25.4 cm) wide, lectern faceplates with AAP openings, including the MLM 104 LAAP and MLM 226 LAAP. Extron SMB 200 Series boxes are designed to be surface mounted on a lectern, tabletop, and other flat surfaces for convenient access to controls and connectors. To surface mount Extron US gang-sized faceplates, SMB 100 Series Surface Mount Boxes are required.