Our cryo markers are provided in micro, fine, and big tip formats. These permanent ink markers are water-resistant and easy to handle, with all colors as equally permanent and long-lasting as our black markers. Can be used on plastic, glass, metal, cloth, and even Teflon surfaces (MP-1 marker), perfect for marking tubes, plates, glassware, boxes, as well as plastic blot membrane development folders, wraps, and photo films.