This is for an OPTOMA Digital Video projector. It is brand new in box. It is part number P/N:5811116037-SOT. Serial Number : WSCO1301161. Marked on bulb: Osram P-VIP 180/ 0.8 E20.8 Type E20.8 180 W It will fit Optoma Projectors models: DS 317, ES 531, ES 532, EX 522, EX 532 and possibly others. (I bought this for a projector that I was told needed a bulb. It turned out the projector was not economically repairable so I have the bulb and can't use I and it was too late to return it.) ***I just checked with MY PROJECTOR LAMPS, the largest seller of projector bulbs in Canada and was told this bulb is $269.09 plus tax plus shipping bringing it to well over $300 . Save over $130 Priced at only $170 I will ship anywhere for my costs. Bulb located in Victoria BC. ****I update my ads IMMEDIATELY so if it is not marked as sold then it IS available so PHONE 250-656-0549 No saturday or Friday evening calls. See other ads by rapsent