SealPlate? 50μm polyester films minimize evaporation, prevent spillage and contamination between wells, and provide a secure seal, not just a cover. Secure sealing of all wells eliminates “edge effects” in sensitive ELISA assays. SealPlate? films can also be used with tissue-culture plates for short-term storage, incubation, and containment of biohazards. SealPlate? films are non-pierceable. Each film measures 3.125 x 5.75 inches.