Lock Ring for Sigma 150-600mm f/5-6.3 DG OS HSM Sports lens.

A lock ring is included with every lens hood order if required by the lens hood.
Lock Ring for Sigma 150-600mm f/5-6.3 DG OS HSM Sports lens. Compatible with Zemlin Photo HZ-1164 Series Hoods. Approximate weight: 23g. Order only as a replacement or if using a hood on multiple lenses.