100% brand new and high quality For Asus UX21E UX21A UX31 UX31E TAICHI21 TAICHI31 ZENBOOK SSD. The adapter card with socket B+M M.2 NGFF SSD replaces the SANDISK models: SDSA5JK-128G, SDSA5JK-256G, SD5SE2-128G, SD5SE2-256GThe adapter card with socket B+M M.2 NGFF SSD replaces the ADATA models: XM11-128G, XM11-256G, UMM-128M3B,UMM-256M3B,UMT-128M3B,UMT-256M3B The speed and other properties does not change.It just changes the interface with adapter card, so you can ensure the quality of SSD.You can properly install the operating system the same as the for Asus UX21 UX31 ZENBOOK original hard disk The product only support the following sizes : 22*42 mm; 22*60 mm; 22*80 mm B KEY SATA fers mode M.2 NGFF SSD. Overall Size: (L*W)9.5*2.4cm/3.74 inch*0.94 inch Quantity:1Pc Color: green Material: PC Package Contents:1 * Converter(The SDD is not include) Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.