Part:6056
From Brickipedia, the LEGO Wiki
Revision as of 23:39, 14 April 2010 by wikia>Mariofighter3
The Tall 2X2 Groove Brick is an uncommon brick that has a cut in slit on the side. This could be used for cables or garage doors. They have only appeared in Fright Knights with a grey or black color.