PfanstiehlDiamond Needle Stylus for Audio-Technica ATN-3472P 3482P Panasonic EPS-91 Sanyo ST-M11 Sony ND-145G: 4213-D6

is this an eliptical or conical sytlus?

What is this stylus' tip shape? what is the tip size? the cartridges this says it fits have many tip geometries and sizes. listing needs more info!