Pack of eight, one-piece plastic lids by Ball. For 90mm regular mouth openings. Reusable, not for food preparation.

Can withstand multiple sterilizations, just wash and reuse! Great for spawn jars. They can be easily adapted to contain a "filter" by drilling a 1/4in hole in the lid and stuffing it with tightly wound polyfil or synthetic pillow stuffing. Works wonders when used with our synthetic filter discs.