EVOS Onstage vessel holders maximize your choice of cell culture vessels when conducting time-lapse imaging experiments using the EVOS FL Auto Imaging System equipped with an EVOS Onstage Incubator. EVOS Onstage vessel holders allow a perfect fit of your micro-well plates, cell culture flasks/dishes, and slides to the master plate of the EVOS Onstage Incubator for increased precision in sample alignment. This particular vessel holder accommodates one Lab-Tek II chambered coverglass. With a snug and secure fit, yet readily switched, these vessel holders make time-lapse imaging convenient and easy.