GE Microwave Oven Roller Wheel / Turntable Support # WB06X10195 Ring diameter 8 7/8" Wheel diameter is approximately 3/4" GE part number WB06X10195 Replacement roller wheel / turntable support for GE over the range microwave ovens. THIS ROLLER ONLY WORKS IN CERTAIN MODELS. BEFORE ORDERING, PLEASE CHECK COMPATABILITY WITH YOUR MODEL BY LOCATING YOUR MODEL NUMBER IN THE LIST BELOW).