The 16-Port Drying Chamber includes 3/4" thick acrylic lid with neoprene gasket, 16 neoprene valves that accommodate both 1/2" and 3/4" adapters for connection of flasks, and one latching pin. Made of type 304 stainless steel. It is compatible with FreeZone 1, 2.5, 4.5, 6, 8, 12 or 18 Liter Freeze Dryers.