The cleansweepsupply.com product catalog, Triangular Scales. http://www.cleansweepsupply.com/pages/subsection1503.html Versatile design lets architects work with maximum efficiency. Change units by rotating dial at either end of scale without moving scale from work surface. 12" measuring length, 1/32" scale. Exact calibrations. Highest quality aluminum. Adjusts to 1/16, 1/8, 1/4, 1/2, 1:1 and 2:1. Ruler Type: Triangular Scales; Length: 12 in; Standard Scale: N/A; Metric Scale: N/A. http://www.cleansweepsupply.com/pages/item-cha238.html CHA238 26.00 Chartpak new http://www.oppictures.com/singleimages/240/CHA238_1_2.JPG CHA238 00014173155009 Art, Drawing & Drafting Instruments Triangular Scales 425 Designed for the exacting needs of engineers. Change units quickly and easily by rotating dial at either end of scale. 12" measuring length, exact calibrations. Highest quality aluminum. Adjusts to 10, 20, 40 and 50 parts to the inch. Ruler Type: Triangular Scales; Length: 12 in; Standard Scale: N/A; Metric Scale: N/A. http://www.cleansweepsupply.com/pages/item-cha240.html CHA240 26.00 Chartpak new http://www.oppictures.com/singleimages/240/CHA240_1_3.JPG CHA240 00014173155047 Art, Drawing & Drafting Instruments Triangular Scales 367 The color coded center groove easily identifies scale graduations. Measurements are precision-etched into a durable laminated plastic for accuracy. Comes in a protective case. 3/32; 1/8; 3/16; 1/4; 3/8; 1/2; 3/4; 1; 1 1/2; 3:1; 1/16 in. Ruler Type: Triangular Scale; Length: 12 in; Standard Scale: N/A; Metric Scale: N/A. http://www.cleansweepsupply.com/pages/item-cha235a.html CHA235A 5.96 Chartpak new http://www.oppictures.com/singleimages/240/CHA235A_1_2.JPG CHA235A 10014173154931 Art, Drawing & Drafting Instruments Triangular Scales 487 The color coded center groove easily identifies scale graduations. Measurements are precision-etched into a durable laminated plastic for accuracy. Comes in a protective case. 10; 20; 30; 40; 50; 60. Ruler Type: Triangular Scale; Length: 12 in; Standard Scale: 10 in; 20 in; 30 in; 40 in; 50 in; 60 in; Metric Scale: N/A. http://www.cleansweepsupply.com/pages/item-cha235e.html CHA235E 5.96 Chartpak new http://www.oppictures.com/singleimages/240/CHA235E_1_2.JPG CHA235E 10014173154962 Art, Drawing & Drafting Instruments Triangular Scales 571 Made of plain white high grade molded plastic. Measurements are printed clearly on the plastic face. 3/32; 1/8; 3/16; 1/4; 3/8; 1/2; 3/4; 1; 1 1/2; 3:1; 1/16 in. Ruler Type: Triangular Scale; Length: 12 in; Standard Scale: N/A; Metric Scale: N/A. http://www.cleansweepsupply.com/pages/item-cha3272.html CHA3272 3.37 Chartpak new http://www.oppictures.com/singleimages/240/CHA3272_1_1.JPG CHA3272 00014173276971 Art, Drawing & Drafting Instruments Triangular Scales 991 Made of plain white high grade molded plastic. Measurements are printed clearly on the plastic face. 10; 20; 30; 40; 50; 60. Ruler Type: Triangular Scale; Length: 12 in; Standard Scale: N/A; Metric Scale: N/A. http://www.cleansweepsupply.com/pages/item-cha3274.html CHA3274 3.37 Chartpak new http://www.oppictures.com/singleimages/240/CHA3274_1_1.JPG CHA3274 00014173276995 Art, Drawing & Drafting Instruments Triangular Scales 720