Penrose Drainage Tubing. 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. Sterilizable. Dimensions: 1", 25 Ft.