Type 115M saddle type threshold can be provided in either ALUMOGRIT® (cast aluminum) or FERROGRIT® (cast iron) Type 115M comes in standard height of 1/2″, standard widths are 4″, 5″ and 6″, standard surface is fluted abrasive surface. Other heights, widths, and plain abrasive or cross hatched abrasive 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).