1.swivel 2. 15T,25T,40T,60T,80T,100T,200T,300T,400T,500T, ... ,600T,700T,800T ,and your speical requirements are also available. 2.We use good alloy to manufacture the swivel.3. Bearing ... . Good wearing, connviences to demount and maintain. HDD swivel for horizontal directional drilling machine