These are 14 replacement Green Ball Cups for the Duratrax Evader ST. These are used on the ball studs. FEATURES: Durable nylon construction INCLUDES: Fourteen Green Ball Cups (key #29) REQUIRES: Nothing. This is a direct replacement part. SPECS: Length: 26mm (1.02") Inside shaft diameter: 3mm (0.19") Ball cup diameter: 4.4mm (.174") COMMENTS: For Yellow ball cups, use DTXC6182 For Blue ball cups, use DTXC6183 For Black ball cups, use DTXC6181 cmc 11/29/01 ir/kh