Hellermanntyton edge protection grommets hv1 series hellermann tyton 633 06088 the hellermanntyton 633 06088 hv1608 is a edge protection grommet made of cadmium free flexible pvc or polyethylene and resistant to various minerals and environmental effects the edge protection grommet is are used wherever cable and wires are routed through outlets and apertures hellermanntyton grommets offer excellent mechanical protection hellermanntyton 633 06088 hv1608 pvc gy g1 grommet grey 110 x 30