Technic Brick 2 x 4 with Top/Side/End Holes and Hollow Studs

Technic Brick 2 x 4 with Top/Side/End Holes and Hollow Studs (part 3709a) is a Technic Bricks used in 16 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.