Corning universal fit tips are designed to provide a reliable fit with most major brand pipettors. (A Pipet Tip Compatibility Guide can be requested or downloaded from the Corning website). Beveled orifice helps ensure accurate fluid delivery. Select from three packaging options: Stack rack tips feature a stack of five racks, each containing 96 tips, for a total of 480 tips in a space-saving design. Bulk packed tips are nonsterile and economical. RNase-/DNase-free. Nonpyrogenic.