GLOV BEAUTY x4 Headers Sterile Disposable 0.5mm Needle Heads with 4 Refillable Micro Infusion Devices 4 Refills include sterile needle heads to attach to your Micro-Infusion device. 4 Micro Infusion Device bottles included too! You can put any serum or hyaluronic acid in these bottles and do your own micro needling at home!