Quantity: 4 * glass cover knob (black), 4 * screws. High : 43mm, bottom: 55mm, height: 26mm.(not include pot lid) High Quality: Bakelite + stainless steel cookware lid handles. There will be no rust. more→Heat-resistant, wear-resistant, insulating, rust-proof, durable, corrosion-resistant, safe and durable. Easy to clean: Pot lid handle, simply wipe the stains with a damp cloth to clean. Suitable for most pot lids, such as kettles, pots, pans and pots. Installation rules: Pot lid handle to install the lid, first tighten the screws from bottom to top, then cover the gasket and tighten the beads on the lid. Proper tightening gives xxx maximum grip.