NEC Laptop Slim Floppy Disk Drive New OEM (FD3238T) Dimensions (DxWxH):135 x 105 x 15mm. Disk rotational speed: 300 rpm. Data Transfer Rate: 500KB/sec. Media: High density (2HD) or normal density (2DD) 3.5" micro floppy disk. Average Access Time: 3ms. Track density: 135tpi. Usage: For notebook, lap-top/notebook size FDD. For 3.5" diskette data storage.