Check the listing for details. New Bullseye Drop Out Ring 008632 (inv. #11400). Condition: New, Made in United States. Listed at 29.99 USD. This is a new drop out ring from Bullseye Glass, model number 008632. Here is their description: "Diameter, 8.9 x 0.4 in (23 x 1 cm); inside, 4.9 in (13 cm) Imported from Creative Ceramics in Europe, these are simply the finest slumping molds we have ever found on the commercial market. Slipcast from a specially formulated clay body, they have an exceptionally smooth surface, accept kilnwash uniformly, and do not crack under repeated usage if handled properly. "Note: The measurements given here are for the outer dimensions of the molds. This is to help you determine whether a given mold will fit in your kiln. Since they are handmade, individual molds will vary in size. Never cut glass to fit until you have measured your mold."