26mm dovetail insert. Both sides attach to 3/8-16 UNC thread mounting points having standard ARRI Ø 15,5mm counterbore for attaching and quickly removing accessories from a camera (compatible with all UMC versions). includes: K2.52082.0 1x Dovetail Insert 3/8in thread K2.52083.0 1x Dovetail Shoe 3/8in thread