Tubing is extensively leached, washed and surface-treated to 99.9% protein-free. Seamless tubing- Free of striations lumen for clear passage of liquids and/or gases. Performance Characteristics: Elasticity – Memory is maintained even after repeated stretching Translucency and uniformity of color – Provides an unobstructed observation of liquid flow line Gripping power – Enables the tubing to grip tenaciously to connectors Dimensions: 5/16" I.D., 1/16" O.D., 7/16" Wall, 50 Ft. Reel