The Gitzo GS5370B Quick Release Plate is a 2.2" square plate that
features both the 1/4"-20 and the 3/8" camera screws. It is a "B" type
plate, and is compatible with G1376M, GH3750QR, and G1576M Off-Center
Ballheads, as well as the G1387B & G1385B quick release adapters.