Carlon B620KR-UPC Ceiling Box, Adjustable Bar Hanger Mounting, 4 in W, 4 in D, 2-1/4 in H, 1-Gang, Polycarbonate, Blue

Ceiling box with 14.38 to 22-1/2 in adjustable bar hanger. 4 in Dia x 2-1/4 in D. Fixture spacing for 2-3/4 and 3-1/2 in. Integral clamps. Listed for fixture support up to 50 lb. UL listed.