Colour coding rings are available to fit over the shell at the base of the gland, and incorporate a flat area 10mm × 6mm which can be engraved or accommodate a label. They can be fitted whilst new connectors are being assembled, but can also be retrofitted to existing connectors by unscrewing the gland, sliding the shell off the connector insert, fitting the ring over the back of the shell, then reassembling. The wire connection to the insert and contacts remains intact during the process. Available in ten colours.