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This is a complete turn-key gate valve solution for your ASM Skimmer. This mod kit will work for the G4, G4x, G5,  or the G6

The Gate Valve Mod Kit allows you to better tune your protein skimmer, allowing you to get the best possible performance. This kit takes very little time to assemble and install, it will take no more than a couple of minutes to complete the project. In addition to the addictional control you will receive over your skimmer, you will also be able to adjust the skimmer without getting your hands wet.