This is a professional and practical pressure cooker lid knob. Comfortable to hold, easy to install and easy to disassemble. It can prevent the hot cover from scalding your hands, explosion-proof, corrosion-resistant, not easy to rust, bringing you of convenience and comfortable use. Features -Color:Black -Material:Plastic -Size:8.00X8.00X3.80cm/3.14X3.14X1.49in -Size:7.80X7.80X3.60cm/3.07X3.07X1.41in -Note: aperture:19mm, 17mm. - Made of plastic material, this pressure cooker lid handle is practical, and can stand up to long-term use. - With sufficient quantities for you, which can meet your daily using and replacement needs. - Comfortable to hold, easy to install and easy to disassemble, saving you time and energy. - These knobs can make your pressure cooker lid more unique and attractive without spoiling the overall aesthetics. - An excellent accessory for pot lids, fine workmanship, not easily deformed or . Package list: 2 x pressure cooker cover knobs 8x8cm 2 x pressure cooker cover knobs 7.8x7.8cm