Arkla, Charmglow, Grill Master, MHP, PGS, Sunbeam Rectangular Rock Grate. 13 5/8″ x 22 1/4″. The depth dimension (front to back) of a replacement rock grate should be within three sixteenths of an inch (0.1875) of the original parts depth to fit. The width of a grate is much less critical....