SNT-166WFD For : 1.0"/1.65"(H),3.5"HDD System : IDE,SCSI I/II/III,Ultra Wide SCSI Fan : 1 x 40mm installed ( rear )          1 x 40 mm ( front / option ) Auto Handle Actuated Release Power Control : Yes HDD Working LED : Yes Array Support : Optional ID Switch : 1.Rotary switch O-F,2.External ID Selector ID No.Display : Yes Dim : 211.5x 148.0x 41.8(mm) Weight : 1Kg

SNT-166A---IDE SERIES, COMPATIBLE AND INTERCHANGEABLE WITH SNT-101A,SNT-105A,SNT-                       106A,SNT-107A SNT-166S---FOR SCSI I, II AND IS COMPATIBLE AND INTERCHANGEABLE WITH SNT-101S,SNT-                       105S,SNT-106S AND SNT-107S SNT-166M---FOR SCSI I,II AND IS COMPATIBLE AND INTERCHANGEABLE WITH SNT-166W SERIES. SNT-166W---FOR SCSI I,SCSI II SCSI III AND ULTRA WIDE SCSI AND IS COMPATIBLE AND                       INTERCHANGEABLE WITH SNT-166M