What is this?Universal pot lid replacement knob, widely used in kinds of cookware pot lid covers, such as kettle covers, pan, saucepan lids, pot lids, glass lid pot, etc.What will I get?Size:51x28mm/1.99x1.09inch;Base Diameter:65mm/2.54inch;Material:Stainless Steel;Pack of 4 x Pot Lid Cover Knob;4 x Screw;4 x Rubber Gasket;4 x Metal Gasket;4 x BaseAre there any advantages of the product?Stainless steel material pot lid knob can withstand high temperature, anti-rust, come with fixing screw.How to use it?Easy to install, the screws are easy to fix, just place the knob correctly, with rubber and metal washers, then screw it tight.What should I notice?Note: Please confirm the size before you buy.