Silicone Tube Material Silicone Cell Type Closed Cell Shape Round Outside Diameter 7/8 in Inside Diameter 3/8 in Length 5 ft Color Red Grade Standard Density 20 lb/cu ft Maximum Temperature 500 Degrees F Minimum Temperature -100 Degrees F Tensile Strength 200 psi Texture Smooth Wall Thickness 1/4 in Firmness @ 25 Percent Deflection 5 to 8 psi Outside Diameter Tolerance +/-0.100 in Inside Diameter Tolerance +/-0.100 in Length Tolerance +/-3.000 in