The Sterile Omni Swab's unique design uses an absorbent multi-layered paper collection head and a non-reactive material that allows efficient DNA extraction for analysis. One of the features of the Omni Swab is an ejectable head that fits into an extraction tube after the collection of cells. The use of an Omni Swab also presents a non-invasive method of collection. When properly used, Omni Swabs are efficient, sterile, highly effective, easily transported collection devices for DNA. Set of 100 Omni Swabs.