Conical earplug made of polyurethane foam. The pressure is evenly distributed in the ear, resulting in optimal comfort. Easily detec table by standard metal detectors because they contain a tiny steel ball and are attached to a detectable cord. High visibility due to blue colour to avoid potential contamination in the food sector. Non-poisonous and hypo-allergenic. Packaged per 200 pairs. Suita ble for: agricultural and food industry.