Feature Item Type: Cartridges Microneedle Material: Plastic, stainless steelSize.Outer Diameter: Approx. 1.16cm or 0.5inInner Diameter: Approx. 0.95cm or 0.4inColor: Transparent color .wang-edit-text{ font-family:'Arial' important } .wang-edit-text table { border-top: 1px solid 000 border-left: 1px solid 000 } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000 border-right: 1px solid 000 padding: 3px 5px } .wang-edit-text table th { text-align: center } 1Cartridges Microneedle: Can be paired with electric microneedle, which promotes beautiful, healthy skin for you at home and gives you a comfrotable use experience. 2Easy to Use: You can install the needle on the microneedle machine like a screw and use it, easy to operate, professional and reliable. 3Disposable Cartridges: Microneedle cartridges is disposable cartridges with individual packaging design, please do not reuse. 49 Pins: The extremely fine 9 pin needle can make active ingredients of nutrient penetrate into skin, thus improving the skin condition. 5Product Quantity: You will receive 10pcs disposable microneedling replacement needle, which is enough for you to use many times for a variety of skin care needs.