The Lifeline(R) Trainer Cable features two- 4ft. trainer cables that act independently of each other while connected to a door, around a pole, or with a partner. Train Hard Two 4ft. trainer cables Connect to a door, around a pole, or with a partner Max flex comfort handles provide non-slip traction and a safe grip. Additional Details 30lb has maximum resistance of 60lbs pull force (30lbs per cable) 50lb has maximum resistance of 100lbs pull force (50lbs per cable) 70lb has maximum resistance of 140lbs pull force (70lbs per cable)