Czech Glass Sapphire Silver Lined 6/0 E-Beads in a tube. Weight 24 grams. 6/0 Czech Glass E-beads are approximately 4mm in size and have 1.1mm diameter hole. Each tube holds approximately 300 beads. These beads are ideal for jewelry making and embellishing. Czech Glass Beads are considered amongst the finest glass beads available in the world and come in a variety of colors, finishes, shapes and sizes.