8Pcs RC Car 2X18X2mm Plastic Rod End Ball Joint Buckle Black w Screw Product Name : Ball Buckle Set;Rolling Metal Balls Diameter : 4mm/0.16" Ball Hole Diameter : 2mm/0.08";Round Head Diameter : 8mm/0.31" Total Length : 18mm/0.71";Thread Hole Diameter : 2mm/0.08" Weight : 8g;Material : Plastic, Metal Color : Black;Package Content : 8 x Ball Buckle Set8 x Screws