Notice: Please refer to the projector user manual when replacing the air filter. Normally, the projector user manual is available on manufacturer's website. The item is able to fully replace the Hitachi MU06641 air filter and works with projector models listed below. Hitachi CP-WX4021NHitachi CP-X4020Hitachi CP-X4020EHitachi CP-X4021NHitachi CP-X5021NHitachi CP-SX8350Hitachi CP-WU8440Hitachi CP-WUX8440Hitachi CP-WUX8450Hitachi CP-WX8240Hitachi CP-WX8240AHitachi CP-WX8255Hitachi CP-X8150Hitachi CP-X8160Hitachi CP-WX4022WNHitachi CP-X4022WNHitachi CP-X5022WNHitachi CP-WU8450Hitachi CP-WX8255AHitachi CP-WU8451Hitachi CP-WU8460Hitachi CP-WU8461Hitachi CP-WX8265Hitachi CP-X8170Hitachi LP-AW3001Hitachi LP-AW4001Hitachi LP-AX3001Hitachi LP-EU5002Hitachi LP-TW3001Hitachi LP-TW4001We suggest you check either original air filter part number or projector model before ordering it. Changing a projector air filter is pretty easy. Feel free to contact us if you need assistance.