Each 5 Minute High Intensity 6 Inch Glow Sticks Pack of 10 have a round, tapered barrel with a hook and a hole at the top. These Glow Sticks are sold in Packs of 10. Therefore when you buy 1, you will receive 10 Blue Glow Sticks. When you buy 2 you will receive 20 Blue Glow Sticks, and so on Glow Stick Color: Blue Dimensions: Length: 6 inches Diameter: 15mm (0.6 inches) Glow Sticks are packaged unwrapped in a baggie. Glow time: 5+ minutes Shelf life: 18 months NOTE: You are buying 5 minute High Intensity Glow Sticks. This line of products is designed for people with a targeted goal – insanely bright light for under ten minutes. Batteries not needed, just crack, shake, and glow!