LEGO Dark Stone Gray Hinge Train Gate 2 x 4 Locking Dual 2 Stubs without Rear Reinforcements (92092)

LEGO Dark Stone Gray Hinge Train Gate 2 x 4 Locking Dual 2 Stubs without Rear Reinforcements has been used in at least 17 LEGO sets over the past 15 years, since it was first used in 2009. You can also find this part in at least 4 other colors. It has a design ID of 92092 which can usually be found molded into the bottom of the part.