KIPP Tube Clamp Right-Angle Aluminum Clamp Series K0476 K0476.530 30.1mm ID
Barely used for single application.
KIPP Product Link: https://www.kippusa.com/en-us/products/METRIC/Tube-connectors-profile-connectors/Tube-clamps/Tube-clamps-right-angle-aluminum/p/agid.1949