The difference is the shell material and appearance.
1 Shell material
HRM-300-126S(40) : Stainless steel
HRM-300-126B(40) : Brass
2. Appearance
Outer design and outer dimen...
The difference is center conductor plating.
BNC-LR-PC-1(40) : Silver
BNC-LR-PC-1(41) : Gold
Gold plating is recommend, as silver plating is oxidized in the air and the col...
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