The cleansweepsupply.com product catalog, Protractors. http://www.cleansweepsupply.com/pages/subsection1499.html The 6" protractor has 1/2 degree graduations and open center. Protractor is 180 degrees and made of tinted transparent plastic with beveled edges. Degree Graduations: 1/2 in; Material(s): Plastic; Ruler Size: 6 in Ruler Edge; Color(s): Transparent Tinted. http://www.cleansweepsupply.com/pages/item-std5685215.html STD5685215 1.57 Staedtler new http://www.oppictures.com/singleimages/240/STD5685215_1_1.JPG STD5685215 00031901902261 Art, Drawing & Drafting Instruments Protractors 9070 http://www.cleansweepsupply.com/pages/item-std5685215.html Shatter resistant plastic protractor has rounded corners and tapered edges. Slotted separation eliminates confusion of supplementary angles and is perfect for artists, students, designers and all craftsmen. It`s actually two protractors in one, with the lower scale reading right-opening angles . Scales are 6" for the outer edge and 10 cm. for the inside edge. Protractor is orange, so it won`t get lost on your desk. Degree Graduations: N\A; Material(s): N\A; Ruler Size: 6 in Ruler Edge; Color(s): Orange. http://www.cleansweepsupply.com/pages/item-csp45777.html CSP45777 0.81 Classroom SAFE-T new http://www.oppictures.com/singleimages/240/CSP45777_1_1.JPG CSP45777 00743118457778 Art, Drawing & Drafting Instruments Protractors 5912 http://www.cleansweepsupply.com/pages/item-csp45777.html Open center clear plastic protractor has sharply defined graduations and a 6" ruler edge. Degree Graduations: N\A; Material(s): Plastic; Ruler Size: 6 in Ruler Edge; Color(s): Clear. http://www.cleansweepsupply.com/pages/item-leo77106.html LEO77106 3.44 Charles Leonard, Inc. new http://www.oppictures.com/singleimages/240/LEO77106_1_1.JPG LEO77106 50026487771061 Art, Drawing & Drafting Instruments Protractors 3077 http://www.cleansweepsupply.com/pages/item-leo77106.html