The oval grout sleeve allows for greater clearance during assembly. Sloped corrugation reduces jamming during assembly to mating structure. Less downtime reworking rebar. The grout sleeve can be used in the standard position or inverted to produce an upside down grout sleeve with 90 degree fill port. Nail flange is offset from the seal to prevent damage to the seal when removed from the form. This product is useful for THIN WALL and SANDWICH WALL production.