Our tips are Zero-Fluid-Retention with beveled, non-wettable UniFit tips. We offer in new premium packaging featuring stand-up DipenserPacks for all bulk-packaged products, improved MiniRacks, and new Ecology MiniStacks for both 200ul and 1000ul beveled tips. New, bi-directional hinged lid assures maximum convenience during use. Puncture resistant, laminated nylon pouches ensure package integrity, product cleanliness, and meet sterile packaging standards that cannot be matched by others. All tips are RNasee, DNase and non-pyrogenic. Pipet tips and racks are autoclavable at a recommended temperature of 120°C at 15 pounds of pressure for 15 minutes.