"2 Ball bearings: There are two ball bearings installed in the pulley to allow for easy rotation and save more force.","Quiet: The pulleys run very quietly and do not produce any noise.","Carrying capacity: The pulleys are made of stainless steel and have a maximum carrying capacity of 400kg.","Max 12mm: The suitable rope size for the pulley is up to 12mm.","Package: 2 pieces 45mm pulleys"
