Dolphin 8 Port Spider Pump Manifold, 1 1/2 inch slip by eight 3/4 inch hose barbs, white PVC Eight 3/4 inch Hose Barbs x 1-1/2 inch Slip Designed for multiple 0.75 inch (3/4 inch) flexible hose line returns Can be plumbed directly to the pump return union or remotely at the end of a 1.5 inch manifold for higher efficiency and optimum pump performance Dolphin Aquarium Manifolds are ideal for your freshwater fish tanks, marine / reef / saltwater aquariums, ponds and aquascaping.