Plastic flex tubing is used to transfer liquids, air, or solids. It is used in a wide variety of industries, such as agriculture, life sciences, pharmaceuticals, laboratory, and medicine. Applications include blood and fluid handling, pumps, electrical and thermal insulation, analytical systems, and food and beverage handling.

Plastic flex tubing is characterized by a round shape, a hollow center, and bend radius (flexibility). It is crimp-resistant and durable, and can have a variety of optical properties with characteristics such as translucence, ultraviolet (UV)-resistance, and hardness.

Plastic flex tubing is commonly made with materials such as polyurethane, nylon, polyimide, polyethylene, polyvinyl chloride (PVC), polytetrafluoroethylene (PTFE), and polyetheretherketone (PEEK). These materials offer strength, and have a variety of flexibility levels, mechanical and weight properties, and chemical, solvent, abrasion, cracking, corrosion, heat, ultraviolet (UV), gamma, and environmental resistances. Some material types and their formulations can be medical or food-grade, and can conform to various government standards for use. Plastic tubing must be tested and monitored by the purchaser to ensure that it is safe and appropriate for its intended application. Polyurethane, for example, is commonly used in industrial transfer of fluid. Nylon can be used in pressure tubing. Polyethylene can be used for food and beverage transfer.