Tube Resistance Chart

RESISTANCE	MEDIUM	HEAVY	EXTRA HEAVY	SPECIAL HEAVY	SUPER HEAVY
COLOR	Orange	Green	Purple	Black	Dark Green
RESISTANCE BY POUNDS (STRETCHED 100%)	3.82 LBS (1.73 KG)	5.39 LBS (2.44 KG)	6.74 LBS (3.06 KG)	9.44 LBS (4.28 KG)	11.24 LBS (5.10 KG)

Measurements are approximate. The resistance is measured in pounds at listed length of stretch. It is advisable to move to a stronger tube to increase resistance rather than stretching a weaker tube to its maximum.