EBaySump or Refugium Kit Lid with inlet or outlet holes.  These lids are designed to fit Aqueon or Imagitarium brand standard glass aquariums of the specified size. Made from black 1/4" cell cast acrylic All parts bonded with Weld-On Cement Sealed lids come with seals installed and one spare o-ring Options: Style - Available with or without o-ring seals.  The O-ring seals are specifically designed to seal 1" PVC inlet pipes in the hole.  These seals are easily removable if you are not using 1" PVC pipe and they are not compatible with your inlet source.  Non-sealed inlets can be used with 1" PVC or any inlet source of the same outside diameter as 1" PVC pipe. Tank Size - Choose the size Aqueon brand tank you have Inlet Holes - The number of inlet (or outlet) holes you need.  Single holes for single feed, two for Herbie style or systems with 2 overflow drains, three for bean animal style setups or those with three overflow drains. NOTE:  This is designed specifically for Aqueon® or Imagitarium™ glass aquariums.  If your tank is not an Aqueon, Imagitarium or you don't know for sure, please contact us prior to ordering with your tank inside dimensions.  To measure the inside, use calipers or trim a dowel rod or rigid piece of cardboard until it fits between the front and back glass of the tank while parallel to the bottom.  Message us with that length and we can confirm if it will fit. Custom kits made to your specifications are also available.  No project is too big or too small.  Please contact us for a quote. Shipping and Return Policy: We take quality and professional production seriously which is why we offer quick shipping, with only 1 business day of handling time.  We also offer a 30 day money back guarantee on all the sump kits we produce. We're so confident you'll be satisfied with your purchase we'll even cover the return shipping on US orders if you're not. ** Proudly Made in the USA **