For maximum strength and rigidity - use the Sludge Judge® Ultra! Constructed of extremely strong polycarbonate and treated with an ultraviolet stabilizer to help reduce deterioration from the sun’s harmful rays. Durable in cold temperatures; can withstand heat up to 280°F. The 3⁄4" dia. sampler is marked with blue tape to designate 1 ft measurements on the tubing. The unit is made up of three 5 ft sections.