Here's a white glazed tube next to a CD 102 for size comparison. Not sure if this is a wall tube or maybe a bushing, I'll let you decide. Pronounced mold line on this piece. The hole through it measures approx 2" in diameter. Condition is mint. No markings. The bottom rim and about an 7/8" above it are unglazed, both outer and inner diameters. $5 + shipping. E-mail with any questions and thanks for looking.