PRODUCT DESCRIPTION: The Spectre Empire Adapter is needed to connect an Empire Relay with a 6mm.This simple fitting is a necessity for many bottle-on blasters, allowing you to use the Empire Relay regulator to accept standard push-to-connect fittings. Made of 316 stainless steel, it is rated to 300psi. It has a 1/8" BSPP thread in the top and screws into the dovetail slide on the Empire Relay. Apply silicone lubricant to the o-ring before installation for best long-term durability. Designed to be installed with a 14mm (or 9/16") wrench.