Durable RF probe Any pitch from 25 to 2540 microns DC to 40 GHz Insertion loss less than 0.8 db Return loss greater than 18 db Measurement repeatability better than -80db Individually spring loaded contacts BeCu , Tungsten or Nickel tips available Variety of footprints Patented coaxial design Available in thirteen styles Custom configurations available Example:40A-GSG-150-P is a Model 40A with Ground, Signal, Ground configuration with 150 microns between each contact mounted in a P style adaptor.