The Extron CPM133 is a 1/3 rack width, 1U AV connectivity rack mounting frame for rack installations. The CPM133 installs on the RSB 129 1U rack shelf that can hold up to three CPM133 modular panels or one CPM133 and two 1/3 rack width, 1U products. The CPM133 can hold up to four single-space MAAP™ Mini AV Connectivity Modules. An integrated cable management rail provides support and tie points for connected cables. MAAP modules are sold separately. Dimensions: 1.65" x 5.63" x 5.05" (4.2 x 14.3 x 12.8 cm)