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Continue to ChatAir Filter - 44mm, Sponge, Straight, Yimatzu Brand, Black - 60A2442BK - PBC69F1 - https://www.electricbikeusa.net/express-parts-catalog/air-filters/air-filter-44mm-sponge-straight-yimatzu-brand-black-60a2442bk-pbc69f1