The Bitspower Dual D5 Mod Top Extreme combines the power of two D5 / MCP655 pumps and puts them in series. This gives you the sheer power of the best pumps on the market with the least pressure drop available. The one piece design ensures minimal number of seals as well as a solid construction. The perfectly CNC machined surface is gorgeous! The unit has dual IN and dual OUT ports for maximum flexibility. A pair of G1/4 stop fittings are included as well.Note: Pumps / Pump Covers / Fittings are NOT included and available below!