LEGO Dark Stone Gray Long Ball Joint with Ball Socket and Beam (90615)

LEGO Dark Stone Gray Long Ball Joint with Ball Socket and Beam has been used in at least 25 LEGO sets over the past 9 years, since it was first used in 2015. You can also find this part in at least 5 other colors. It has a design ID of 90615 which can usually be found molded into the bottom of the part.