With the increasing number of Versalab M3 grinders with its great dosing tool for SINGLE DOSING we are also able to provide special adapters "VERS3" and glass hoppers now. It´s also possible to use the standard Mahlkoenig MK adapter which uses the same inner diameter ( approx. ø 50 mm) but it´s more expensive and of course, the MK uses the outer bayonet you don´t need for the Versalab grinders. The better choice indeed is this special made Versalab adapter. Useful and recommended glass for the Versalab is 250/300/450 and 600 size.