Mount your projector or flat panel display with ease using this general purpose 4x4 in ceiling adapter. It is compatible with all standard 1.5 in. NPT interfaces and can support up to 300 lbs. The adapter can be mounted to any structural wood unistrut (accessory required) or structural concrete (accessory required).Specifications Weight capacity - 300 lbs. (136kg) 1.5 in. NPT thread compatible - Yes Mounting surface - structural wood unistrut (accessory required) or structural concrete (accessory required) Construction - high-grade cold rolled steel Product finish - scratch resistant epoxy powder coat Item Weight - 0.7 lbs. (0.3kg) Dimension - 4.5 L x 4.5 W x 1.2 H in. Color - BlackFeatures Attaches to solid structural ceiling or standard 1 5/8 in and 1 5/8 in unistrut - SKU: CMSN052