Agilent K281C Coaxial Waveguide Adapter, 3.5 mm (f), 18 to 26.5 GHz
MECCANIXITY Brass Pipe Fitting Water Meter Coupling G3/4 Female x G1/2 Male Thread Hex Connector Adapter 26.5mm Length - Amazon.com
Amazon.com: Gardena Threaded Aerator Adapter: Adapter for Connecting The System to Indoor Taps with Aerator Head, M 24 x 1 and 26.5 mm (G 3/4 Inch) Male Thread (18209-20) : Industrial & Scientific