Amazon.com: 7.5 Inch Microwave Turntable Ring, Rotating Ring Roller, Middle Glass Plate Tray Support Holder, Replacement Inner Ring - for 10.6"-12.4" Microwave Oven Glass Turntable Plate : Home & Kitchen
Kuzma Outer bronze ring clamp - Kuzma Professional Turntables, Tonearms and Accessories
Universal Turntable Periphery Stabilizing Outer Ring Clamp SS-1 | website