The Laird (TE Connectivity) GRO is a replacement rubber boot for Laird’s “G-” series NMO-style magnetic antenna mounts, fitting the 3¼ inch magnetic base used across the G8, GB8, GBR8PI, GR8UM and related models. The boot sits over the base of the magnetic mount to protect painted vehicle surfaces from scratching and marking during use, and helps prevent debris and moisture ingress under the magnet. A simple, low-cost spare for anyone running a fleet of magnetic-mount NMO antennas who needs to replace a worn or damaged boot without buying a whole new mount.