Specifications: 1 1/6″ diameter at the tip, 15/16″ diameter at mid-range, 1 3/4″ from the main body to pressure point. The Helix is larger at the tip (1 1/16″ versus 0.9″ on the MGX). This item has an insertion length of 4 inches. The Helix also has a stockier base, larger tip and is more angled for extra vigorous stimulation. Use: Place the head into the anus (similar to a butt plug). Make sure that the curled arm (handle) is between the buttocks and the upturned arm touches the perineum. The item itself should be tilted forward. Important Note: Per the manufacturers selling agreement this item must sell no lower than their MAP of 67.00.