LEGO Medium Stone Gray Hinge Brick 1 x 6 Locking Double (30388 / 53914)

LEGO Medium Stone Gray Hinge Brick 1 x 6 Locking Double has been used in at least 10 LEGO sets over the past 21 years, since it was first used in 2003. You can also find this part in at least 9 other colors. It has the design IDs 30388, 53914 which can usually be found molded into the bottom of the part.