The ET-PKL420B Bracket Assembly from Panasonic when used with the ET-PKL100H / PKL100S ceiling mount brackets (sold separately) allows you to mount Panasonic LCD Projectors to ceiling.
Panasonic ET-PKL420B Specs
Compatible with ET-PKL100H / PKL100S ceiling mount brackets
PT-LW330/LW280/LB360/LB330/LB300/LB280 LCD Projectors
Dimensions 10.9 x 2.15 x 8.07″ (276 x 54.5 x 205 mm)
Weight 1.5 lb (0.7 kg)