Features Wide Application: It can be used as water pipe fitting, furniture legs, bookshelf, DIY wall shelf, etc. Easy to Use: Precision threads ensure tight connection, safe and reliable. No need for welding, crimping or glue - just push to form a waterproof seal. Durable: Made of high quality malleable iron, high hardness and strength, solid and durable. Long Service Life: Corrosion resistant, rustproof, long service life. Good quality can not only provide a safer guarantee for your life, but also good materials can prolong the service life of products. Cleaning And Sealing: It is recommended that you clean and seal each component to ensure that they do not rust. Specification: Material: Malleable Iron Color: Black Thread(Optional)Inner DiameterSize1/2" 18.5mm/0.74in4*4*4cm/1.57*1.57*1.57in3/4"24mm/0.94in4.5*4.5*4.5cm/1.77*1.77*1.77in 1"30mm/1.18in5.5*5.5*5.5cm/2.17*2.17*2.17in Package list: 5 * Pipe Fitting Package List