This fascinating 7" x 6" device allows students to make real scientific measurements of declination, altitude, and azimuth of celestial bodies in order to determine latitudinal position or to observe the motion of the Earth. Measurements of slope, strike, and dip of geologic features can also be taken. Instructions are included on the Astrolabe. Shipped directly from the manufacturer. Not available with rush shipping. Information on how to place your order by fax or by telephone. Product Number AA3015H