uxcell 4 Pcs Plastic Piping Hose Fitting Straight Connector 1/2" to 1/2" NPT Product Name : Hex Nipple Fitting;Thread Dia(Approx) : 20mm to 20mm / 1/2PTto 1/2PT Inner Hole Dia(Approx) : 13mm / 0.5&#39;&#39;;Overall Length(Approx) : 4cm / 1.6" Color : White;Material : Plastic Weight : 28g Package : 4 x Hex Nipple Fitting