It is designed for the 2021 M1 Macbook Pro 14 and 16 inch. What exactly is a Ninja Stealth Drive? It is an aluminum microSD card adapter that fits 100% into your Macbook without annoying overhangs. You can insert a microSD card into this adapter. This gives you up to 2TB of extra storage space for your computer. For example, if you insert a microSD card into your Ninja Stealth Drive, you get extra storage space on your Macbook. The write and read speed of microSD cards varies from brand to brand. You can choose your preferred brand and use it with your Ninja Stealth Drive. Beautiful, isn't it? Your computer now has more storage space! (When using a microSD card with 512 GB, an additional 512 GB is available!) Applicable models: 2021 Macbook Pro 14 inch (A2442) Model Identifier: MacBookPro18,3, MacBookPro18,4 Part Numbers: MKGP3xx/A, MKGQ3xx/A, MKGR3xx/A, MKGT3xx/A Such as: 2021 Macbook Pro 16 inch (A2485) Model Identifier MacBookPro18,1, MacBookPro18,2 Part Numbers: MK183xx/A, MK193xx/A, MK1A3xx/A, MK1E3xx/A, MK1F3xx/A, MK1H3xx/A *We also offer HDMI connectors (aluminium). The choice is yours!