The OTD X stippling tip. Measuring 0.120" x 0.120", with an 'X' cut through the middle, this tip provides a moderate texture with a very repeatable look given the square shape. Can also do borders utilizing the straight edge, then do a random pattern in the middle. The random pattern can be different depending on the depth of penetration done by the user.
5-7 on the OTD Grip Index.