These popular and economical manifolds are made of brass and are tested up to 3,000 PSI in pressure. Each manifold offers up to 6 outlets with 1 inlet. The inlet and outlets are 1/4 inch NPT thread. Purchase the 1/4" NPT to B Size adapaters to use with this manifold for easy connection of torches. Purchase the 1/4 inch plug to plug up outlets that are not needed.