NSEN 2 Pcs Black Replacement Resistance Bands/Fitness Bands Tubes Compatible For Billy's BootCamp Replacement Resistance Band Tube Compatible For Billy's BootCamp Middle Bands, Fit for Men and professional Fitness. Rubber Size: 6mm x 10mm x 1050mm Great for gym, home, travel and office use Package inlcude 2Pcs Bands as picture show.