4720420, 0.2-2 mL seripettor® pro Bottletop Dispenser4720420 Includes Only:Spare dispensing cartridgeDischarge tubeTelescoping filling tubeThree PP adapters (45/38mm, 45/33mm and 45/S40mm)Operating manualThe seripettor®pro is a bottletop dispenser designed to handle a wider range of liquids than the regular seripettor® for customers who do not require all the features of the Dispensette®. Like the regular seripettor®, it features an easily-replaceable wiping seal dispensing cartridge, making it especially suitable for liquids that tend to form crystals. Its pump assembly has a corrosion resistant spring and an opaque upper sleeve to protect reagents from UV-light during dispensing, while allowing for observation of reagent to confirm purging of bubbles. The seripettor®pro mounts on most common reagent bottles with its 45mm thread.The seripettor® pro is a bottletop dispenser designed to handle a wider range of liquids than the seripettor® for customers who do not require all of the features of the Dispensette®. Like the seripettor®, it features an easilyreplaceable wiping seal dispensing cartridge, making it especially suitable for liquids that tend to form crystals. Wide chemical range - Valves and seals on the seripettor® pro allow a broader range of liquids to be dispensed than the regular seripettor®. Protects light-sensitive reagents - Pump assembly with Hastalloy stainless steel spring. An opaque upper sleeve helps protect liquid from UV-light during dispensing operations, while permitting observation of cylinder to confirm purging of bubbles. Replaceable dispensing cartridge - Quick-change cartridge makes service a breeze and keeps life-time service costs low. If wiping seals wear out, or are damaged by crystallizing reagents, just change the inexpensive cartridge, and you're back in business! Telescoping filling tube - Filling tube adjusts to fit many bottles without cutting. Discharge tube with a threaded safety screw cap - Attach and remove the discharge tube with a quick twist. Spring-loaded piston - One-handed, semi-automatic operation is possible. Threaded safety cap - Cap is attached and removed with a quick twist.