Masontops Wide-Mouth Tough Top Canning Jar Lid (4-Count) MagnaFlex The disc's advanced laser melting

The disc's advanced laser melting process provides a long-lasting and durable carbide edge bond for increased durability and long cutting life

Fits flush with floor

Extra large clamp faces spread clamp pressure evenly

and feature an array of new functionality

and waterproof cement paint

Masontops Wide-Mouth Tough Top Canning Jar Lid (4-Count) MagnaFlex The disc's advanced laser meltingTough Top lid turns any mason jar into an air tight storage container. The underside of each durable, food safe plastic lid has a custom gasket channel which holds the BPA free silicone gasket in place at all times. 100% leak proof. Dishwasher and freezer safe. Tough Tops are NOT intended for Canning. Do not heat or boil.