Size: 3mm x 5mm(1/8 inch x 3/16 inch) (I.D.xO.D.); Length: 1.5m/5ft Operating Temperature: -76°F to +428°F; Hardness: 65 Degree Silicone Rubber Tubing - will withstand repeated use and for visual inspection of fluids. This silicone tube is made of silicone rubber which is nonreactive, flexible, and resistant to high temperatures. Multi-purpose: Transferring liquid and gas, such as liquid handling, pumps, siphoning, drain, and water&air hose for aquarium etc.. Features:The thickness of silicone tubing = ( OD - ID ) / 2.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. Applications:Water/oil change;Siphoning & draining;Machinery connecting pipe;Electrical equipment, such as the casing;