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: 53 x 23mm/2.07 x 0.9inch（D x H);Base Diameter：69mm/2.69inch;Color:Black;Material:Stainless Steel; Screw Size: M5*17mm;Pack of 4 Pot Lid Cover Knob SetAre there any advantages of the product?Plastic  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.