Programmable servo SP-03D, black model with metal heat sink. - Model: SP-03D - Color: Black - Type: Programmable servo - Features: Metal heat sink Thank you for viewing. I had no particular complaints, but I am selling it to match the servo types with other vehicles. I have a program card, so I can also ship it after rewriting the program to your desired settings before shipping. (Please rewrite it yourself if you need to rewrite it after arrival)