The O-rings hold the 15 gauge spindle firmly when they are compressed by the two M2 screws.

@Sources

• http://shpws.me/nbBr

@Requires

• M2 screw (2)
• [M2 nut] (F20N) (2)
• [O-ring] (VR02) (2)
• 15 gauge hypodermic tubing mm(120)

• Print your own