SHARP 111E, 3030E, 303E, F111E, SG33, SGF111E, ST05, ST707J, STG33. STYLUS Model: ST05. The two most common stylus shapes are spherical (conical) styli and elliptical styli (bi-radial). A typical conical stylus tip (similar to a ball point pen) has a larger radius (compared to an elliptical stylus).