For a customized look, Novak is offering an interchangeable colored sleeves to slip onto any Novak 540-size brushless motor. Simply unscrew the end bell, keeping in mind the insulating paper and shims, and switch the existing sleeve. These aluminum sleeves are compatible with all Novak 540-size brushless motors, including the Ballistic Series, Velociti Series, Velociti Light Series, SS Pro Series, Drift-Spec Series and Crawler Series. There are five sleeves available: black (#S5420), blue (#S5421), gold (#S5422), purple (#S5423) and orange (#S5424).