Genuine MASONRY MORTAR JOINT SPACERS for Cinder Block & Bricks, in bulk packing. Purchased full case, these are left over. 

16 packages of 20 pieces.  Total of 320 spacers.   

Makes Laying Block and Brick Simple, Fast and Foolproof..! Keeps courses level and joint's at a perfect 3/8". Eliminates "Crushing" of the Mortar Joint's.