Hey there! If you need clear warning signs for medical areas, these magnetic 'No Smoking Oxygen in Use' labels are perfect. They're made from high-density soft plastic with a tough PVC coating that won't crack easily. Each sign measures 7.8\ x 1.77\ x 0.03\ with rounded corners that prevent peeling and make them more durable. The bright red background with clear warning text really stands out, plus they've got a protective transparent film over the printing so it won't rub off. What's super convenient is how they stick firmly to any metal surface - doors, cabinets, medical equipment - but come off easily when you need to move them. They even work on curved surfaces! You get 6 signs in each pack, which is great for stocking multiple areas or keeping spares. Just a heads up - these magnets don't like high heat or rough handling, so keep them at room temperature and they'll last ages. Perfect for hospitals, clinics, home care, or anyplace where oxygen is used. They make safety protocols visible without any permanent installation needed.