Insulin Syringes Needles • KDL: Manufacturer name (KDL) [image_OdmEvy.png]. • 0.5ml: Syringe capacity (half ml) and is sufficient for up to 50 units of insulin [image_OdmEvy.png]. • 31G: Needle thickness size (which is a very thin and comfortable size for the skin) [image_OdmEvy.png]. • 6mm: Needle length (6 mm) [image_OdmEvy.png]. • U-100: Type of insulin concentration compatible with it [image_OdmEvy.png]. The single needle costs 5 riyals.