Instructions for use: 1. Get to twist off the protective cap 2. After using the lancet needle tip is inserted after the protective cap and placed within a special closed gas Description: Type:Soft Color:Blue The outer diameter of the lancet:21G Quantity:100Pcs Note: 1. Do not reuse lancets 2. Do not leave any blood lancet pen 3. Before using the protective cap has fallen off, do not use the lancet Package include: 100Pcs Lancet Needles +1pcs Acupuncture Pen Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2cm differences due to manual measurement.