Article reference KA-02153
The cable entry on the 4 inch Simply Silent fans is approximately 21mm.
Applicable Models:
DX100BHTR, DX100BHTS, DX100BPR, DX100BPS, DX100BR, DX100BTS, DX100HPTR, DX100HPTS, DX100HTR, DX100HTS, DX100PR, DX100PS, DX100R, DX100S, DX100TR, DX100TS, DX100PIRR, DX100PIRS
C4S, C4R, C4SR, C4TS, C4TR, C4TSR, C4HTS, C4HTR, C4HTSR, C4PS, C4PR, C4PSR
LV100TS, SSLV100HPTS, SSLV100HPTR, SSLV100HTR, SSLV100HTS, SSLV100PIRR, SSLV100PIRS, SSLV100PS, SSLV100R, SSLV100S, SSLV100TR, SSLV100TS
SSSFC100, SSISFC100