These Swab Evidence Envelopes are great for packaging DNA swab evidence. The white envelopes are perfect for packaging swabs with swab boxes. Preprinted with all the pertinent information when collecting DNA evidence at a crime scene. Evidence tape or seals should be used to ensure evidence integrity. Envelopes imprinted with black text and an orange BIOHAZARD symbol. Custom printing available. Swab Evidence Envelopes provided in packages of 100.