3D Printed - Slightly soft, slightly rubbery feel.  Press-on All versions of Quadmouse

• Round Ball is ideal for use with lips and included with Quadmouse and gives sensation of slightly less movement relative to full joystick deflection
• Long Narrow is ideal for use with lips and included with Versatility v5 - Extra length gives sensation of slightly more movement or finer control of partial joystick deflection
• Concave-Cup shaped is ideal for use with finger or tongue 
• Textured Bumps - if preferred