Low Voltage 600 Watt CONTRACTOR SERIES Transformer. Dimensions length = 14.3 inch, Width = 6.65 inch, Depth = 6.1 inch. Kichler's Contractor Series provides the best options and flexibility needed for most installations. Output voltage will suit most jobs. Features include a commercial grade toroid core and coil submersible rating, pluggable timer and photocell outlets plus a 10 year warranty.