LEGO Medium Stone Gray Technic Cross Block 3 x 2 (Axle/Triple Pin) (42191 / 63869)

LEGO Medium Stone Gray Technic Cross Block 3 x 2 (Axle/Triple Pin) has been used in at least 142 LEGO sets over the past 15 years, since it was first used in 2009. You can also find this part in at least 13 other colors. It has the design IDs 42191, 63869 which can usually be found molded into the bottom of the part.