Chemstores main supplier of pipette tips has changed their manufacturing process and no longer produces colour-coded pipette tips. The reason provided for the change is that the dyes can affect results.  Because colour-coding is often part of a lab's workflow, Chemstores is soliciting feedback from UNBC users to determine whether or not to stock the clear Sarstedt tips.  If your lab has strong preference or would like information, please contact Chemstores.