OMG.
I haven’t seen new U40 syringes in at least 30 years.
I think U40 may have stuck around a little longer in Europe than in North America.
I think Veterinary insulin may be U40? OMG, here’s a recent advertisement by BD for them “inventing” the U-40 syringe just in the past few years: http://www.animalhealthinternational.com/animalhealthinternational.com/media/Animal-Health-International/NSM16/VPL/BD-U40-Detailer.pdf