These beautiful low profile bullet GRIPZ come with gold plated 4mm bullets.
 
Ideally suited any RC setup that doesn't allow for the traditional gripz - they feature a gold plated low resistance plug that fits snug and secure in any 5mm tube. The bullets feature a recess for secure solder joints with any 11-16AWG wire.
 
The LowPro Bullet Plug GRIPZ are an interferance fit - once your wire is soldered and secure the GRIPZ slide snugly over the top making easy identification of the positive and negative ends. 
 
For additional security why not add a few drops of your favourite CA glue.