Pullup Assist Bands,Resistance Pullup and Mobility Bands - Best Resistance Band For Assisted Pull-Ups, Powerlifting,Cross training,Exercise & Mobility Workouts - 6 Levels of Resistance - 3 PC SET Made of 100% pure Latex Rubber.Lightweight ,Portable and Durable material. Ideal for Crossfit, pull ups, ring dips, Yoga, Pull Ups, Power Lifting, Stretching and other exercises. Build strength by using them with barbells, dumbbells, to provide progressive resistance during exercises such as squats, bench press. Resistance band training, All parts of the exercise goes through resistance, getting better motion strength and stimulation, hence promoting muscle growth. RED - 15Ibs-25Ibs ( 1/2" * 4.5mm) BLACK 50Ibs - 75Ibs ( 7/8"*4.5mm) PURPLE 100Ibs - 120Ibs ( 1-1/8" * 4.5mm ) GREEN 120Ibs - 175Ibs ( 1-3/4" * 4.5mm ) BLUE 175Ibs - 230Ibs ( 2-1/2" * 4.5mm ) ORANGE 230Ibs - 250Ibs ( 3-1/4" * 4.5mm )