The Promise Technology Fibre Channel Module is an x10 Series SAS spare I/O module designed for use with the VTE310fS, VTE310fD, VTE610fS, and VTE610fD hard drive arrays. - x10 Series SAS spare I/O module - Designed for use with the VTE310fS, VTE310fD, VTE610fS, and VTE610fD hard drive arrays - Lightweight (4.6 lb / 2.1 kg)