A
tight-fitting and small-size (13 x 8mm) connector with very low loss.
Rated number 1 by R/C Car Action, The Ultra Plug actually has less
resistance, including the solder joints, than an equivalent length
piece of 12 gauge wire.
Good
for up to 80 Amps.
One
package contains two connectors- one Male, one Female, and a piece
of heat-shrink tubing.
$3.25 
The best connector I have ever used
Deans plugs
