uxcell Silicone Tube 4mm ID X 6mm OD 16.4' Flexible Silicone Rubber Tubing Hose Pipe Translucent for Pump Transfer;

This soft, flexible tubing is designed for a variety of pump and transfer applications. It is made of silicone rubber which is nonreactive, flexible, and resistant to high temperatures. The tubing can withstand temperatures from -76 to +428F.
The thickness of tube = ( OD - ID ) / 2

Uses:
Siphoning & draining;
Water/oil change;
Machinery connecting pipe;
Electrical equipment, such as the casing;