Stainless steel ball bearing swivel, 1/2" BSP male x 1/2" BSP female with flat seal, 9mm bore. These ball bearing swivels are stainless steel (316). In case of using a water gun with a fixed hose tail, the ball bearing swivel will improve the users comfort and the water hose’s life time. All stainless steel swivels have VITON (FDA) seals. These swivels are for the low pressure environment and can take up to 30 bar.