6mm Alexandrite Two Hole Bar Czech Beads by CzechMates. These CzechMates 2 hole Bar beads are perfect for bead weaving or as a spacer. They are 6x2mm and have a slim rectangular shape with two parallel holes on the flat side of the rectangle. Each of the holes are 0.8mm. These come in a 2.5” tube with approximately 125 beads per tube. Each tube is approximately 9 grams.