Description:Item Type: Hair Extensions ToolMaterial: Silicone, PlasticColor: Black, Light Brown, Brown, Dark Brown, BeigeSize: App 3.8mm ( Outside Diameter ), 2.8mm ( Inner Diameter ), 2.8mm( Height )Case Size: App 6.6 x 4.8cmWeight: About 60gPackage Included:About 1000 Pcs x Micro RingsFeature:1. Silicone micro link beads,hair extension tool.2. For loop hair extension and hair extension Hot-melt adhesive, double spring leaf structure.Note:1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight deviation for the measurement data.3. Please allow 1mm-0.2mm error due to the hand measurement.