A 2 foot antenna cable of standard RG-58 coax cable with BNC connectors at each end. Loss of 1 dB or less with 0.25" diameter.
See also:
ARG2RT - 24" coaxial RF cable with right angle BNC male at both ends
ARG15 - 15' antenna cable of standard RG-58 coax cable with BNC connectors
ARG25 - 25' antenna cable of Belden 9913F low-loss coax cable
ARG50 - 50' antenna cable of Belden 9913F low-loss coax cable
ARG100 - 100' antenna cable of Belden 9913F low-loss coax cable