Check the listing for details. Debox SM40 Inline 4 Pole Junction Box Enclosure. Condition: New, Made in China. Listed at 19.08 USD. Debox SM40 Inline 4 Pole Junction Box Enclosure Debox SM40 Inline 4 Pole Junction Box Enclosure The Debox SM40 is the first 4 pole inline junction box that fits into a 40mm aperture yet still retains a generous cable management space. This makes Debox SM40 ideal for use in LED lighting. As with all Debox Junction boxes, Debox SM40 comes ready for use, supplied with all components including the terminal block, making connection simplier and easier. The mini Debox SM40 is only 50% of the volume of the Debox S and SL, making it the most compact 4 pole junction box available. Fits inside a 40mm aperture Supplied with 4-Pole Terminal Block Smallest Junction Box with 4 Poles Flame Retardant to UL94V-0 Housing Complete with 2 Locking Clips (one spare) Registered design: 008190920 eBay & Ecommer.