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AJMRTC 40 mm projector color wheel is a dedicated replacement optical spare part for Optoma W307UST, X307UST, X401, X142, X125, S310E and S312 DLP projectors. Wornout original color wheels often cause abnormal symptoms such as color shift, distorted tint, flickering pictures, rainbow visual streaks and annoying rattling grinding noise. Each unit undergoes balance and function testing before dispatch to guarantee smooth rotation and precise lightsplitting effect. Manufactured to match original dimensional and optical specifications for direct swapin installation. Ideal costeffective maintenance component for professional repair centers and personal DIY projector refurbishment. Please confirm your exact projector model before purchase to avoid incompatibility.