Brass compression female straight fitting is made of one brass body, one brass o-ring and one brass nut. Because nickel-plated before fine finishing, the color of body surface is silvery white and the thread of nut and body is brass color. Just one side can connect pipes and the another side can connect other fittings or pipes with female thread. The process of production is forging, shot blasting, fine finishing, assemblying, testing and packing.  They are used to connecting for both pex-al-pex pipe and pex pipe, from size 1216 to 4050. The female tread size is from 1/2 inch to 2 inch. They can be used for hot and cool water-supply system and civil heating system. The compression fittings are easy to install,just tighting the nut to the body, without any special tools,so which makes them also easy to be replaced.