[Product dimensions:]- outer diamater 7.5 inch /18.9cm, inner diamater 6.9 inch /17.5cm, wheels are about0.55 inch /14mm tall [Microwave Ring for Turntable]- compatible with 10.6 inch -12.4 inch /27-31.5cm microwave glass plate, great replacement for your older one. [High quality]- microwave ring made of high temperature material, durable and long life span. [Rotatable design]- with three small wheels, keep your food revolving in the microwave oven, helps heat fast and balanced. Colour:White Material:plastic Size: Inner diameter: 175mm Outer diameter :189mm Package Contents: 2 x Turntable bracket Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.