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These Microwave Coaxial to Waveguide Adapters come with either an sma or type n output, VSWR is usually 1.25 max. Our wr51 / wr62 /wr75 coax to waveguide adapters are considered "right angle", vs in-line. Our WR62 parts mate with UG1665/U, UG419/U, and UBR140 Flanges. Our WR51 parts mate with other WR51 parts, its a commercial standard. The WR75 parts mate with other WR75 parts, and the UBR120 Flange.