Good quality PAR 64 cans. very strong rugged construction, nice thick square filter holder frame, HO7 rubber cable, even safety wire fixed with high quality hardware fixed to the can. Ceramic socket of good quality and wiring ceramic block enclosed in it's own metal protection block and cable all insulated in fibre glass sleeving. a couple of suggestions to thomann to improve this would be silicon cable instead of HO7 rubbber, less ventilation holes in the back of the can as this leaks a lot of unwanted light spill especially if used in a theatre, also means to adjust PAR lamp by rotating knob or PARsafe, other wise can't complain a bout these units for price, very good quality in comparision with more exspensive James Thomas PARs, another high quality product from the thomann range