LEGO Red Hero Factory Armor with Ball Joint Socket Size 5 (90639)

LEGO Red Hero Factory Armor with Ball Joint Socket Size 5 has been used in at least 13 LEGO sets over the past 13 years, since it was first used in 2011. You can also find this part in at least 30 other colors. It has a design ID of 90639 which can usually be found molded into the bottom of the part.