Able to be swapped out for another tube, the 18-36-Degree Lens Tube for Leo Ellipsoidal from NSI/Leviton provides an adjustable beam angle for variable coverage when paired with a separately purchased Leo LED light engine. The tube comes with the lens elements installed and has four shutter blades and a gobo slot for shaping the light output and projecting patterns. The lens tube includes a Safety Guard, Metal Color Frame, and a B-size Gobo Holder.