GPD Global | https://www.gpd-global.com/co_website/pdf/dispense/Dispensing-Systems-and-Pumps-Overview.pdf
. GauGe paRt no. 0.1016 mm / 0.004” 32 G 221BL32018A 0.127 mm / 0.005” 31 G 221BL31001A 0.15 mm / 0.006” 30 G 221BL30001A 0.18 mm / 0.007” 28 G 221BL28004A 0.21 mm / 0.008” 27 G 221BL27005A 0.25 mm / 0.010” 25 G 221BL25007A 0.33 mm / 0.013” 23 G 221BL23006A