Low Voltage 75 Watt CONTRACTOR SERIES Transformer. Dimensions length = 8.23 inch, Width = 3.67 inch, Depth = 4.59 inch. Kichlers 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.