Abstract: A split grommet assembly comprising a grommet and a clamping ring. The grommet has a body portion with a peripheral edge and a sealing groove round the peripheral edge of the body portion. The grommet also has a gland portion with a peripheral edge, and a hole passing through the body and gland portions. The body and gland portions are each split along a split line which runs from the hole to their peripheral edges. The clamping ring encircles the peripheral edge of the gland portion and can be opened to permit an elongate object to be fitted into the hole via the split line, and closed to apply a compressive load to the peripheral edge of the gland portion which resists opening of the body along the split line.