They are extruded silicone rubber tubing.
Major applications and end products
In extreme condition, certain tubes can resist 300°C
for a short time. They are commonly used in contact with foods in
accordance with provision of FDA 21 CFR 177.2600 and in electric
This kind of products is suitable to be used in
appliances where constantly in contact with liquid and high
temperature. The tubes may also feature properties like high
pressure resistance, high-transparence, high-dielectric strength
and flame retardant.