The MR30 are excellent connectors for use between motors and ESCs. Great for multi-rotors, smaller aeroplanes, or any project that requires an easy, high current 3 pin connector.
They come with wire covers, so you do not need heat shrink.
Specs:
Amps: 30A Continuous
Female Size: 14x12x5mm (with Cover)
Female Weight: 1.0g (with Cover)