WEIPU Original SP13 2 3 4 5 6 7 9 PIN WATERPROOF CONNECTOR
IP68 POWER CABLE AVIATION PLUG SOCKET
Male plug, female socket

If you are looking for the in-line 2-9pin, here is the link:
WEIPU original SP13 serias 2 3 4 5 6 7 9 pin panel mount/in-line waterproof connectors.

2pin, 3pin:
Rated Current (A): 13A
Contact diameter × number: Φ1.6x2 / Φ1.6x 3 
Rated voltage (AC.V.): 250V
Withstanding Voltage (AC.V) 1 minute: 1500V
Contact resistance: 2mΩ
Wire specification: <2m㎡/14AWG

4pin, 5pin, 6pin, 7pin:
Rated Current (A): 5A
Contact diameter × number: Φ1x4, Φ1x5, Φ1x6, Φ1x7
Rated voltage (AC.V.): 4pin-200V，5pin-180V，6pin-125V，7pin-125V
Withstanding Voltage (AC.V) 1 minute: 4pin-1500V，5 6 7pin-1000V
Contact resistance: 5mΩ
Wire specification: <0.785m㎡/18AWG

9pin:
Rated Current (A): 3A
Contact diameter × number: Φ0.7x 9
Rated voltage (AC.V.): 125V
Withstanding Voltage (AC.V) 1 minute: 1000V
Contact resistance: 10mΩ
Wire specification: <0.785m㎡/18AWG

Material: Plastic
IP Rating: IP68
Shell: Nylon66
Fire Resistance: V-0
Contact Material: Brass with Gold Plating
Termination: Solder
Cable Outer Diameter Range: 4mm~6.5mm default.(if you need 5-8mm please)
Mating Cycle: >500
Temperature Range: -25~+85℃
Insulation Resistance : 2000mΩ

What's in the package: (as to your choose)
 1  plug + 1 socket with cap