Contractor pack. Includes 4 each PS1 housings and 4 each TRM30W white baffle trims. For new construction. Convertible IC/non-IC. Type-IC suitable for direct contact with thermal insulation, up to 90W maximum lamp when used with TRB30 trim. Non-IC for use in noninsulated areas, or when insulation is kept at least 3'' away. Up to 150W maximum lamp. Strong interlocking bar hangers adjust for joist center from 16'' to 24''. Bar hanger flange automatically levels housing, spring clip allows easy repositioning along the bar hanger. Release the spring to lock the housing. Built-in Romex strain relief, hinged cover to prevent accidental loss. Thermally protected to guard against overheating. Ceiling opening 6-1/2'', 7-1/2'' D. x 6-1/2'' W. x 11-1/2'' L. UL listed for damp locations.