... length: 317mm 3) Material: optical acrylic 4) Suitable for Projector and Epidiascope Specification:Product: BHPA317-2Size: 318*250mm ... rays2) It is suitable for PROJECTOR,EPIDIASCOPE and so on3) Also be suitable for stage lighting, hot water heater ... , solar furnace, LCD projector, computer screen magnifier, virtual reality game flight simulator, computer ...