I have used at least ten of these pipettes to date, used them extensively for both liquid transfer and mixing and each one has performed well. No splintering has occurred, and when I throw away a dropper to avoid cross-contamination, I usually get a pang of waste regret because the dropper is still in perfect condition. pipettes, if at all. Another review claiming these droppers are flimsy is completely unfounded. I would still give this pipette set 5 stars, but more so now to make up for this different rating. Will definitely buy again. Karter Scientific is now a respected brand in my opinion - I bought 3 sets of 50, 100 and 250ml cups and they were all in perfect condition and have held up incredibly well, and my set of 10, 50 - and 100 ml measuring cylinders has proven itself to be accurate in the measurements and also to withstand perfectly. Would buy and probably buy again.
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