LEGO Dark Stone Gray Gear Rack 14 x 2 with Groove and Connectors (18942 / 60578)

LEGO Dark Stone Gray Gear Rack 14 x 2 with Groove and Connectors has been used in at least 16 LEGO sets over the past 9 years, since it was first used in 2015. You can also find this part in at least 3 other colors. It has the design IDs 18942, 60578 which can usually be found molded into the bottom of the part.

• Beam
• Track
• Zipper