LEGO Dark Stone Gray Support 2 x 2 x 10 Girder Triangular Vertical (Type 4 - 3 Posts, 3 Sections) (4687 / 95347)

LEGO Dark Stone Gray Support 2 x 2 x 10 Girder Triangular Vertical (Type 4 - 3 Posts, 3 Sections) has been used in at least 5 LEGO sets over the past 14 years, since it was first used in 2010. You can also find this part in at least 18 other colors. It has a design ID of 95347 which can usually be found molded into the bottom of the part.