These pads are impregnated with a heat-released deodorant that doesn't merely mask autoclave odors, but actually neutralizes them with one of four pleasant scents. Protective cover melts in autoclave bag, allowing deodorant to be heat activated. Neat and easy to handle, simply unwrap and place a pad in each bag prior to autoclaving. Odo-Clave?é?« pads are 32mm (1?é??") square. They have a three year life span, but will last longer if stored in a sealed container. 10 pads per bag, 10 bags per box.