Instantaneous fittings are brass or aluminum couplings designed for use in forest fire fighting. Since ends are interchangeable (there are no male or female hose ends) and connections are made with a simple quarter-turn, multiple hoses can be laid out and joined quickly. Aluminum hose fittings have the advantage of lightweight, while brass hose fittings are stronger and more resistant to cracking during installation. All our couplings come complete with expansion rings, however we also offer replacement rings so that couplings can be reused.