Thank you for viewing. I am selling this because I used it a couple of times (2-3 times) but it didn't suit me. I used it with a Sigma 82φ lens. It cost 4499 yen when I bought it. The following is from the website: iShoot Metal Camera Ring Type Tripod Mount, Tripod Mount Ring, Lens Support Collar, Lens Bracket Collar, Tripod Socket, Compatible with Sony LA-EA5 Mount Converter lens adapter ring, ARCA-SWISS tripod/ball head clamp compatible Please refrain from purchasing if you are looking for a new item or if you are sensitive to the condition of the item. Thank you for your understanding.