Tiella 800RLSRT15DZ MonoRail Single-Feed 150W 12V Magnetic Surface Transformer is a rich Bronze finish, and mounts to a standard 4IN square junction box with round plaster ring (provided by electrician), and the Rail drops 3IN from the ceiling. Longer drops can be achieved by adding a Power Extender (not included) which comes in lengths of 6IN up to 96IN. Surface transformers for a Rail system must be placed directly above the system. Tiellas magnetic surface transformers come standard with an integrated debuzzing dimming coil to reduce noise when using a low-voltage magnetic dimmer. The 800RLSRT15DZ is 7.1-Inchwide by 3.5-Inchhigh, and will power up to three 50W elements or up to four 35W elements (not included). The 800RLSRT15DZ comes one per package. MonoRail components are not included (sold separately). Tech Lighting started small back in 1988. Since then we have continuously built our reputation for timeless design, precision engineering, and trust. Today, we are recognized as the industry leader in low-voltage lighting systems and for our expansive collection of premium light fixtures. At our core is an intense appreciation for art and science, sophistication and imagination. We race to introduce new innovations to the market - both in design and technology. We travel the globe visiting trade shows not just in our industry, but everywhere that design can be observed - from furniture to fashion. We partner with glass artisans throughout the world to create the highest quality blown glass. Though, it extends beyond glass. Every detail counts. Our passion does not end with product. We are fanatical about exceeding our customershighest expectations with short leads times, on-time delivery, expansive custom capabilities and the most knowledgeable and accessible customer service and technical support department in the industry.