Nunn Design - These quality products are made in the USA in Brass.

Shape/Style: Deep Channel Brass Open Bezel Large Circle Single Loop
Color: Antique Gold
OD: 28.8 x 24 x 9.7mm
ID: 21.2x21.2mm Dia x 5.5mm 
Channel 7.7mm width x 1mm depth
Quantity: 1

All Sizes Approximate