Residential Lead Detection Instant Lead Test Swab Kit Home Lead Testing (80X4=320 Pcs Rapid Home Testing Swabs) 30-Second Results. Dip in water. Home Use for All Surfaces - Painted, Dishes, Toys, Jewelry, Metal, Ceramics, Wood (LS320)80 Counts Value PackX4: Each box contains 320 Pcs of the Lead Test Kit, providing a cost effective and valuable solution. Shelf life is 2 years. 30 Seconds Instant Results: Obtain quick results in under 30 seconds with the highly sensitive Lead Paint Test Swab. Incredibly Easy to Use: Wet the swab tip under water for 5 8 seconds, shake off excess liquid. Once the swab tip turns mustard yellow, promptly rub the painted surface for 30 seconds. Easy Test