Exchange drives with ease with this extra drive tray for satsasbp425 and satsasbp125 series backplanes this 25 hard drive tray lets you add even more flexibility to how you manage your data storage with the satsasbp425 and satsasbp125 series backplanes this spare drive tray can help you save time in a fast paced work environment its interchangeable with trays from the startechcom satsasbp125 textsingle bay backplane satsasbp125 and the satsasbp425 textfour bay backplane satsas