Features: 1. Quick Results: Don't worry don't guess. In seconds you'll know if lead safety measures are required. 2. Simple to Use: Dip the cotton swab slightly not completely in water and as soon as the tip of the swab turns mustard yellow wipe the painted surface with a lead-based paint swab. 3. Easily Discernible Results: After rubbing the painted surface red/purple/pink indicates lead detected. Yellow means lead is not detected. 4. Multiple Uses: Lead inspection swabs are used on wood metal drywall and plaster. This means that only one test is required to reliably determine the absence of regulated lead-based paint on most surfaces. 5. Safe Material: Swabs are made of high-quality environmentally friendly materials which are harmless to the human body. Please don't put cotton swabs in your mouth Specification: Product Size: 18*16.5*8cm Product Weight: 50g Scope of application: Toys woodworking tableware jewelry bathtub glaze pottery antiques plumbing etc. includes: 30pcs* Lead Test Swabs "