70 mm Autoclavable Plastic Lids--Set of 10
These one piece lids are ideal for use in spawn production and are superior to metal canning lids in that they will not rust or warp. One or two 1 inch diameter holes should be drilled through each (a 1 inch hole saw works well for this purpose) and a filter disc inserted underneath to allow contaminant-free air exchange. Available in two sizes. For jars with 70 mm diameter openings. Color: various.