ALVIN 280P Architects Scale is two-bevel architect scale progressively graduated 1/8" equals one foot and 1/4" equals one foot. The scale is progressively numbered on the 1/8” side 0 thru 96 so that 12 inches equals 96 feet. The ¼” side of the scale is progressively graduated from 0 thru 48, so that 12 inches equals 48 feet. This architectural scale is made of high impact plastic and supplied in vinyl pocket sheath. 280P two beveled Architects scale by Alvin.