Inside Socket End - Black is made of Delrin Acetyl Resin Compound. This fitting is locked in place by notching the tube or installing a rivet or screw to stop the fitting from sliding out.
Delrin has excellent resistance to corrosion of any kind and is unaffected by water exposure. Colour is cast in, not coated on which means that it hides scratches well and are self lubricating to a degree. These fittings are injection molded under high pressure to give excellent tolerances in a lightweight, economical product design for durability and performance.
Available in 3/4" and 7/8". Sizing speaks to the O.D. of the tubing these are being inserted into.
Sold each.