The Fluidtrol 1-100-5105A 10" Clear Acrylic Cover for Center Vent Basket Strainers Built Pre-2015 or with Serial Numbers <12467 is designed for compatible center vent strainers built prior to 2015 or with serial numbers below 12467. Made of cast transparent acrylic, it protects the straining system while allowing users to look inside without removing the lid. Note: this lid will ship with protective masking film, which must be peeled off prior to installation.