WDT Needle Thickness Tested

A video comparing 0.25mm, 0.3mm, 0.35mm and 0.4mm acupuncture needles for performing Weiss Distribution Technique (WDT) for espresso puck preparation. Chapters 00:00 Introduction 01:58 0.25mm needles 03:40 0.3mm needles 04:41 0.35mm needles 05:29 0.4mm needles 07:10 Conclusions