3ml Cartridge Plastic Medical Consumables Disposable Pen Injector 60IU 80IU Insulin Injection Pen Spring driven delivery for an effortless and comfortable injection process Intuitive and proven twist motion dose dialling and push-button activation for maximum patient acceptance Bayonet connection and sliding for quick cartridge change High quality look & feel Product Features Disposable use Minimum Single dose 0.01ml; Injection of high precision, the error is less than 5%;