One 10 gm TUBE. SILVER LINED TANZANITE color 39, 3mm cubes. Toho Cubes feature a diamond shaped hole in the top quality 3mm beads. The hole allows for the beads to sit correctly in beading patterns.. Each tube features a friction cap with a hangable loop. Tubes contain approximately 10 grams of beads (bead weight indicated does not include the weight of the tube).