ViagrowTM 1/2" Rubber Grommet
The ViagrowTM 1/2" (13 mm) Rubber grommet is a versatile tool. Use them as replacements for worn, old, cracking grommets on your existing hydroponic system or as a necessary tool when constructing a new hydroponic system. Additionally they can be used to insulate and seal around holes cut in solid panels, while damping vibration and minimizing abrasion on wiring.