Type 109 hook strip type threshold can be provided in either ALUMOGRIT® (cast aluminum) or FERROGRIT® (cast iron) Type 119 comes in height of 5/8″ only, standard widths are 4″, 5″ and 6″, surface is fluted abrasive surface. Other widths, and intermediate dimensions to order. Lengths are made to order. Maximum length is 8’6″ in ALUMOGRIT® and 6’0″ in FERROGRIT® (lengths over maximum will be made in equal sections).