Sealing Mat for 24 Square Well Plate, Natural Silicone Material, 10 pieces per pack, Item Number MS2172S. Non-Stertile. Sealing Mats manufactured from research-grade silicone, are easy to open and close, have good sealing performance and can prevent the volatilization of a variety of solvents. Can withstand a wide temperature range of (- 50ºC - 200ºC), and is suitable for various experiments. Excellent chemical resistance and can be autoclaved.