1/4"x 1/8" - 3 x 2.1/2" 150lb BSP Stainless Threaded Hexagon Reducing Bush Grade 316 This 150lb BSP Threaded Hexagon Reducing Bush 316 in stainless steel is suitable for use with water, oil, gas and other mediums. Manufactured to ISO 4144, this product comes in a multitude of thread sizes and can handle a working pressure of 300psi (20 bar