And usually some customers in order to save cost, they also require casing centralizer suppliers to design the centralizers with fixing function. They request to add nuts and screws directly on the rigid centralizers, so the centralizers can fix itself on the casing when installed onto the casings. So it’s not necessary for the stop collars. That can save two stop collars for each centralizers, and the installation time of the stop collars when run the casings in the oil well.