are added the configuration shown is primarily used in a stack bond type construction in a stack bond the block joints line up vertically with each other on every course in such construction proper alignment of the blocks is essential to making a strong and aesthetically pleasing wall fig1 is a top plan view of the invention 1 the invention is a formed spacer preferably made of plastic or similar materials the spacer forms a u201c t u201d shaped member made up of a lateral body 3 and a perpendicular body 4 the perpendicular body 4 has an alignment finger 5 that extends upward above the lateral body see e g fig3 this finger provides the alignment function as discussed below fig2 is a bottom plan view of the invention here the lateral body 3 and perpendicular body 4 form a common base two grooves 6 and 7 are formed in the base as shown these grooves align with spacer onto the reinforcing wire as discussed below fig3 is a left side elevation view of the invention here the lateral body 3 and groove 6 are shown along with the perpendicular body 4 and the alignment finger 5 fig4 is a rear elevation view of the invention in this figure the alignment finger 5 is shown behind the lateral body 3 note also that groove 7 is shown in this view in the preferred embodiment the top surface of the lateral body 3 is curved of course this body can have a straight or angled top as well.