Thu, 23 May 2013 22:03:03 GMT Ponoko - Items by mShapes tagged with mshape http://www.ponoko.com/showroom/mShapes/9337 This is a Bessel function-shaped pencil holder. It's the 3D plot of a Bessel function of the first type, with alpha = 3.<br></br><img alt="Mshape005_-_bessel_function" src="http://static3.ponoko.com/design_images/images/77778/8934c476-6f28-d39e-61d1-2c658a3c1259/mshape005_-_bessel_function.stl_showroom_image.png?1356824056" /> Sun, 30 Dec 2012 00:01:34 GMT http://www.ponoko.com/showroom/mShapes/9337?time=Sat+Dec+29+23%3A49%3A11+UTC+2012 mShapes