Features: Use with Single head lancing pen pin Remove the lancing pin and cap at once. It is disposable one. Do not use it again after used. Usage: Remove the metallic cap by twisting it . Place the lancet and remove the circular cap by twisting it . Place the disposable cap . Sterilize the lancing part and starts lancing . Remove the lancing pin and cap at once after finished. Description: Item Type: Lancet Device Cover Color:White Material: PE Size: 3.1*1cm/1.22*0.39in(As picture shown) Packing: OPP Quantity:10PCS Package included: 10PCS Lancet Device Cover Notes: Please allow 1-3CM differs due to manual measurement.2. Item Picture 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.