CoreX Assisted Pull Up Bands. Loop bands. Resistance Bands. Pull Up Bands. 41 Inches. Highest Quality. 7 Resistance Levels Sale is for a single band. CoreX RipFit has seven different resistance/tension levels. Refer to the WHICH BAND IS RIGHT FOR YOU? image to aid band selection. You are presently viewing Band # 6 (Black). This band is 2 5/8" wide, 4.5 mm thick and 41" in length, providing 60 to 150 Lbs of tension. This band provides a large amount of resistance and is great for training stronger muscle groups. The band is suitable for stronger or heavier men, as it provides sufficient resistance and pull up assistance for heavier users. CoreX sells an extensive range of resistance training bands, wall mounts and door anchors. We also sell resistance training kits with multiple bands providing varying degrees of tension 15 bonded Latex layers for added durability and tear resistance. Free 57 page E Book detailing 44 exercises, 8 workout programs as well as training tips.