2.5'' NPT Threaded Closed Aluminum Conduit Plug for Explosion Proof Junction Boxes - External Square Head $500 - $1000  The IP68 ingress protection

  The IP68 ingress protection rated housing makes them impenetrable to dust and submersible under water up to 3 meters

Not only because of reduced cable costs

Mounting: 200 lbs Grip Magnetic Base

19" in depth and offers high performance under low light conditions

2.5'' NPT Threaded Closed Aluminum Conduit Plug for Explosion Proof Junction Boxes - External Square Head $500 - $1000  The IP68 ingress protectionSpecifications Additional Information EPJ CP EHS ALU 2. 5 Threaded Closed Plug Ratings Unit Type: Threaded Closed Plug Class I, Divisions 1 & 2 Groups C & D Dimensions: Class I, Zones 1 & 2, Groups IIB & IIA Weight: 1. 4 lb Class II, Divisions 1 & 2 Groups E, F, & G Materials: Copper free Aluminum Class III Finish: Natural Hub Size: 2. 5" NPT Color: Silver Temperature Rating: 50C to +60C Toll Free: 1 800 369 6671 NEMA Rating: 3, 4 Intl: 1 214 616 6180