Caps for screw cap cryotubes to allow to write on top of the tubes. Printed in PLA and PLA+ and they are working pretty well at -80 °C, holding shape and ink.

Compatible with Fisherbrand tubes. Ideally with Sarsted ones as well but it was not tested, let the community know in the comments ;)

Depending on your printer bed and quality, their conical shape allow them to be printed as you prefer. Keep in mind to keep the flattest surface finish for the wider part of the cone, for best ink writing quality (or sand it afterprint). I suggest to print in bulk and without skirts/rafts.