Colour: Black. Male thread size: 3/8BSPT (The outer diameter of the male thread is about 16 mm.) Size: 56mm(2.2in)x27mm(1.06in), hole inner diameter: 7.7mm / 0.3inch. Robust, highly durable and environmentally safe with a long service life. Air compressor special design, air inlet and outlet, oil resistance, mini air outlet design. Ideal spare for air compressors, quite good oil connections. Great for replacing old or broken ones. Widely used in air compressors. Notice: Please check the male thread type carefully before ordering.