This test is sensitive to lead. You will get test results in 30 seconds, just put the testing swab into white vinegar. Scitus lead testing kit swabs are non-toxic, odorless, and won't leave stains on your skin or clothes, so there's no need for industrial hazardous material disposal containers or protective gloves. Utilize them to test countertops, vinyl, plastic, or painted surfaces. Each box contains 30 lead detection swabs. These lead tester swabs are the least expensive lead testing product on the market, as can be shown by a quick pricing comparison. PROS🟢 30 second fast results Affordable with no lab fees CONS🔴 Not the most precise