This is Petzls large ring designed to be installed on to the bridge of your harness. This is noticeably more substantial than the DMM rings, with a bigger internal diameter than the large DMM and the aluminium used is a bigger diameter too.
Weight - 70g
Internal Diameter - 46mm
I find the large ring on your harness's bridge to be better than the small. The large allows you to attach more than one carabiner to it and is big enough to pass a gate through the middle while installed on your bridge.