The aluminum water cooling jacket is designed to allow water to come in direct contact with the motor and flow around it, allowing maximum cooling.Fits: SSS 4074/4082/4092, Leopard 4074/4082/4092, & TP Power 4050/4060/4070Available in two colors:- Black or Red Specs Length: 50mm long (1.97") Diameter: 48mm (1.89")Fitting thread size: 5mm thread **Motor not included.**