Profile: Quality Couplings Ltd. is a provider of brass compression fittings and accessories. We also provide copper, plastic, or other metallic tubes for use in control systems, vacuum, boats, power washers, cookers, and for plastic molding. Our couplings are best suited to half hard copper tubing, and are also suitable for use on soft or hard copper tubing. They will withstand pressures at a greater level. We avail a wide range of accessory products. Some of our other products are blanking plug, brass gas type ring, copper coupling ring, coupling nut, metric lock nut, nylon ring and tube nut.