Triletics CardioBands 799666470110 Pro Pack Machine attachments, 21"/32 oz, Black 100% Other Fibers Made in the USA and Imported Cardio Bands Pro Pack is the go-anywhere, attach-anywhere system that combines resistance and cardio training into one ultimate workout The Cardio Bands Pro units attaches to a treadmill or exercise bike, benches and more. Instantly convert any routine into a full cardio-resistance workout that's twice as effective in half the time YOUR PRO PACK INCLUDES: 3 combinations of resistance! 2 Cardio Bands Pro Trainers 2 Levels of Resistance Bands 4 Fixed Handles ..and Visual Instruction Guide