Shop for Ether-Type Polyurethane Tubing. Ether-type urethane (PUR) tubing is clear and offers an outstanding balance of abrasion resistance and flexibility. It is used for high purity applications such as instrumentation, water treatment, and in the handling of petroleum-based products. It complies with FDA CFR 21 for food packaging. Stocked products typically ship in 2-5 business days. Can’t find what you need? Get a quote.