Product CM-FA-4SB-MKO-EXT 0288-0480 4 Square Red Fire Alarm Specification Sheet - CM-FA-4SB-MKO-EXT Specifications Color Red Cubic Capacity 21 In³ Depth 1.5 Inches Insulation None Knockouts (8) 1/2" - (4) MKO Material 16G Steel Series CM-FA-4SB-MKO-EXT Standard UL Type Extension Ring UPC 190010060504
