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: 1/4" I.D., 1/32" O.D., 5/16" Wall, 50 Ft. Reel