Rock 2 x 2 with Center Stud, LEGO® Part# 30596.

Appears in the following set(s): 7317 (Aero Tube Hanger), 7316 (Excavation Searcher), 7315 (Solar Explorer), 5960 (The Mermaid Castle), and 4579 (Ice Ramp Racers). 

To learn more about the parts we offer, email us at info@atlbrick.com or call us at our storefront at 470-414-2208 and we'll be happy to help to answer any questions you may have.