Size: Microwave turntable ring outer diameter: 17.8 cm/7.01 inch., inner diameter: 16.7 cm/6.57 inch., swivel roller diameter: 0.55 inch/14 mm, same size can be universal. Use scenario: Suitable for microwave oven glass plate tray wheel ring, high load capacity, light weight, good impact resistance. Support wheel rings: Designed with three 0.55-inch rollers for easy food storage, helps to heat quickly and evenly, which ensures a smooth and consistent rotation of the glass plate. PPS material: The microwave oven tray holder is made of pps, which is long-lasting, flame retardant, high temperature resistant, corrosion resistant and not easy to deform. Packaging: You will get two 2pcs microwave turntable rings, easy to install, just remove the old, broken turntable rings and replace them with our new, turntable rings. Within minutes, your microwave oven will be back to its optimal performance!