1/2" inner diameter, 5/8" outer diameter - (12.7 x 15.9 mm) - A popular large tube size for those bigger projects. Made harder so the walls do not collapse. Be sure to look at the picture of it next to a ruler, to make sure it is correct for your needs. Hardness: Shore-A 70.
Ultra clear, platinum cured pure silicone that is food safe, driking water safe, and medical application approved, with proper sterilization.
UV resistant and will not deteriorate outdoors, silicone will remain flexible and supple even after years of outdoor service. Extremely durable and kink-free.
Insulates extreme heat and cold, and remains usable from -100°F to +500°F.