1/2PT x 3/8PT Male to Male Thread Hex Nipple Fitting Pipe Connector Product Name : Hex Nipple Fitting;Male Thread (Approx) : 20mm to 16mm /1/2PT to 3/8PT Inner Diameter(Approx) : 17mm to 13mm / 0.67" to 0.51";Overall Length(Approx) : 23mm / 0.9" Color : Gold Tone;Material : Brass Net Weight : 16g Package : 1 x Hex Nipple Fitting