resistance bands, rubber bands

K-502-5Bresistance bands, rubber bands: KS-502-5BTubing size:* 1 yellow elastic (5-6lbs)6*9* 1 green elastic (7.5-8.5lbs)6*10* 1 red elastic (10.5-12lbs)6*11* 1 blue elastic (15-18lbs)6*12* 1 black elastic (22lbs)6*13* 2 foam covered handles* 1 door anchor× 2 ankle strapsHow does door anchor work? Hold the soft foam end by the door opening, Place the foam end in betweenthe door and door frame and shut the door, Open the loop on the end which comesthrough the door, Thread the elastic through the loop - That's it..you're in!How does exercise band work? For example when you begin an exercise like Biceps curl and your arm is straight,the yellow elastic produce 5lbs of tension, By the end of the movement when your armis bent and the elastic is stretched, the same elastic is producing 6lbs of tension. The works is same ways of the other color elastic This bands systems come with 4 or 5 bands. Each band is a different thicknesswhich ends up creating a different level of tension. When you want to perform anexercise you simply clip the elastics on to the ankle straps or handles. Since everyelastic has the clip, you can use them individually or combined to create manydifferent levels of tension.