1.Material: Material is safe and reliable, made of high quality stainless steel and acrylic ball, not easy to rust, corrosion resistance, nontoxic and harmless. Strong and Long time to use. 2.Size: Diameter 10mm/0.4inch, bottom ball diameter is about 8 mm/0.3inch, top ball 5 mm/0.2inch, easy to wear, fit most people. 4.Wear comfortable: Cue moderate length, will not result in a fire, give you a comfortable feeling, color variety, meet your visual needs. 5.Usage: Perfect for bikini, swimsuit, summer short sleeve Tshirt, etc., random color, quantity and style enough to meet your daily wear needs, you can share with your sister. 3.Smooth: Bright surface, smooth, smooth appearance, strong texture, fashion design, comfortable to wear, give you a clean and comfortable feeling.