Cone Base 6 x 6 with 'X' Cutout

Cone Base 6 x 6 with 'X' Cutout (part upn0290) is a Non-System Parts used in 2 official LEGO sets. Scan or search to authenticate loose parts and check market value. Open the parent-set list to see which themes and years used this mold — essential when a common shape appears in a rare color or print.