LEGO Dark Red Ball Connector with Perpendicular Axelholes and Flat Ends and Smooth Sides and Sharp Edges and Closed Axle Holes (60176)

LEGO Dark Red Ball Connector with Perpendicular Axelholes and Flat Ends and Smooth Sides and Sharp Edges and Closed Axle Holes has been used in at least 6 LEGO sets over the past 16 years, since it was first used in 2008. You can also find this part in at least 26 other colors. It has a design ID of 60176 which can usually be found molded into the bottom of the part.