OXYGEN IN USE Stickers measures 3" x 5", included 10 packs, made of self-adhesive vinyl decal. Danger warning sign reads: OXYGEN IN USE NO SMOKING NO OPEN FLAMES. Notify staff of when and where smoking is not permitted in your facility. NO SMOKING STICKERS prohibit smoking and open flames in areas where oxygen is in use. It is the most widely recognized design format in the industry, The red color is used when there is a hazardous situation which has a high probability of death or severe injury can occur Dont smoke danger stickers indicate the presence of oxygen and warns that no smoking or open flames are allowed. Self Adhesive Sticker is easy peel and stick to walls,tables and anywhere you want. QUALITY CUSTOMER SERVICE: Any question about products or orders, please feel free to contact the customer service, we will try our best to solve the problem.