IAI America RCS2W - Manual (Page 71)

2. Installation
63
2.4 Connecting the Air Tube of the RCS2W Dustproof/Splash-proof Type
Intake/exhaust port
Install the air tube (outer diameter: 10 mm, inner diameter: 6.5 mm) on the intake/exhaust port and guide the air
tube to a location where the external environment assures the tube will not come in contact with water.
(Applicable tube)
Shown below is a representative model of air tube that can be installed on the RCS2W:
x TU1065: Polyurethane tube (Manufacturer: SMC)
Caution: The air tube should not be more than 3 m long.