I recently purchased some XT-60 connectors from Amazon. 10 pr. for $7.49 with red and black heat shrink. Seemed like a good deal. After closer exam I found that the female had no solder stop. It was just a tube. When soldering there is a strong possibility of the molten solder wicking down the tube into the contact area. This is not good. I wanted to share this so you might not find the same problem. I ended up filling out a return and after reading buyers reviews decided to try another brand, AMASS that had some much better review. These came with machined ends that insure the solder cannot wick into the contact areas. At a slightly higher price, 10 pr. for $10.99 with snap on covers instead of heat shrink, I am quite satisfied.