IET Genuine OEM Original Replacement Lamp for ASK C431, C431W Projector (Power by Ushio bulb)ASK Projector Lamp OEM Replacement projector lamps for the following Projector Models: ASK C411 ASK C421 ASK C431 ASK C431W ASK APU L4 Original Part Number: ASK APU L4 Warranty: 180 days We only use original manufacturer bulbs from well known brands such as Philips, Osram, Ushio, Matsushita and Phoenix. Our housing units are made from durable and high quality materials and are guaranteed to fit properly. This lamp with housing will meet the original