and high quality For UX21E UX21A UX31 UX31E TAICHI21 TAICHI31 ZENBOOK SSD. The adapter card with socket B+M M.2 NGFF SSD replaces the models: SDSA5JK-128G, SDSA5JK-256G, SD5SE2-128G, SD5SE2-256GThe adapter card with socket B+M M.2 NGFF SSD replaces the 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 the quality of SSD.You can properly install the operating system the as the for 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 transfers mode M.2 NGFF SSD. Overall Size: (L*W)9.5*2.4cm/3.74 inch*0.94 inch :1Pc Color: green Material: PC Package Contents:1 * Converter(The is not include) Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.