4mm to M3 L Shape Push in Pneumatic Quick Connect Tube Fitting Coupler 10pcs M9 The matching rubber gasket makes

The matching rubber gasket makes the screws more fit and not easy to fall off

02-inch (D*H)

3mm diameter threaded two tip 30mm length tight adjustable steel push rod is used for rc airplane

The twist drill bit is used with electrical drilling machine

10 x 38mm size

4mm to M3 L Shape Push in Pneumatic Quick Connect Tube Fitting Coupler 10pcs M9 The matching rubber gasket makesDesigned for Polyurethane or Nylon tubing. Even after installation, the direction of the tube can be changed freely. Elliptical release ring help to connect tube easily by manual, no special tools required. Outside (and Inside where applicable) hexagonal wrench tightening. This Quick fittings are only used for industrial automatic apparatus.