DW corner cover plate (box of two) 58399

Ordering a quantity of 1 will get you a box of two corner top plates (where the green corner category header magnets will go).   

Apprx 29"W x 9"T  (735mm x 225mm)

You will also need one 9" extension (61684) per standpipe.  Don't forget, a corner bay utilizes three standpipes.