Lid has a corner notch on the A1 corner to correspond to the corner notch found on all Corning microplates. Surface Treatment: Not Treated. Corning #: 3099. Lid is made of rigid polystyrene Lids are made of rigid polystyrene Lids have a corner notch on the A1 corner to correspond to the corner notches found on all Corning® microplates Sterilized by gamma... This Corning microplate lid is made of rigid polystyrene. Lid has a corner notch on the A1 corner 3571 | Corning® 384-well Low Flange Black Flat Bottom Polystyrene TC Corning Polystyrene Microplate Cap Corning Polystyrene Universal Microplate Lid With Corner Notch Pk50 3099 Corning Microplate Lids Lid does not fit Corning 2L 1536 well microplates GALPADA 3pcs Underarm Sweat Vest for Women Breathable and Quick-dry Design Comfortable Sweat Absorption for Running Yoga and Activities Skin Tone ; Quantity Sterilized by gamma radiation.