Dispensing Nozzle for low volume amidites on Dr Oligo plate instruments. Not for Dr. Oligo 192c or Dr Oligo 768 XL. This a 10 pack of PEEK nozzles. There was a time when the Dr. Oligo plate instruments used these PEEEK nozzles for the low volume amidite systems. However we also used A Teflon tube with a stainless steel insert. In either case all 8 positions for a given amidite must use the same nozzle design. One can change nozzle design but it must be for all 8 nozzles. Mixing types of nozzles within a set of 8 nozzles on a given amidite is not allowed.