Made from natural latex rubber, a thermoset material. Excellent resilience, tear and tensile strength. Contains no plasticizers which can migrate and cause flow contamination or tube hardening. Latex rubber tubing is a translucent amber color. *Tubing may have a maximum of five sections, with a minimum section length of 4 feet, in 100 ft. lengths; a maximum of three sections, with a minimum section length of 4 feet in 50 ft. lengths.