Each lid ordered is made for the individual who has ordered it, to suit the needs of their tank and preferred set up.No om initial contact all the way to boxing and labeling your very own ClearView Lid. All lids are custom programmed, cut, screened, and shipped from our facility here in the USA.Our lids are screened with a UV protected 1/4” plastic mesh, which is secured with spline under the frame to continue that sleek look and also to allow for ease of replacing the screen if needed in the future.However, only Tsunami and Pisces EXO can be customized in the future to accommodate changes in configuration. Every lid is customizable to accommodate feed doors, light mounts, overflows and auto feeding systems.Acrylic will bow and warp when used for this application. We do not use acrylic in any of our lid products. All lids, and lid accessories, are made with Lexan, a clear polycarbonate plastic which is also commonly used in manufacturing bullet resistant glass, riot shields, and jet windshields.All lids are designed to rest inside the rim of your tank, to give you that signature ClearView appearance, while still providing the peace of mind that comes with knowing your finned friends are safe.There are also many great features that are shared by all ClearView Lid styles. All Pisces Lids for tanks 4 feet and over will include one removable center brace.Inserts kits are currently only available by email request and separate invoicing after order has been placed.Inserts are also a great solution for those with over curious feline friends! These removable inserts allow you the ability to control evaporation and maintain better air/gas exchange at the same time. NEW Solid Insert Kits are available for the Pisces EXO.Cord slots may be placed directly in the corners. * All cutouts ordered must be 5" from any corner.The vented frame all but eliminates any chance of condensation collecting on the bottom of the frame, contributes to better air/gas exchange, and boasts a better than 50% reduction in frame weight compared to similar Classic or Tsunami lids. The interlock configuration is adapted in this design, however, to incorporate a vented frame. The main frame utilizes our patent pending interlocks which were introduced with the Tsunami. The Pisces Exoskeleton is in a class all by itself. The Pisces EXO - Such a unique and ground breaking feat of fish safety tech that just calling it a 'lid' would be a great injustice.* All cutouts ordered must be at least 2.5" from any corner.Yet, with the integrated support tab system nestling your lid below the glass edge, Tsunami blends right in evoking a subtle statement of protection over your aquarium. Tsunami can even be reconfigured to fit a completely different tank! As Tsunami uses an interlocking section design, it produces less waste during the production process making Tsunami our most economical design choice. different light setup, adding extra feed doors). Tsunami can be reconfigured to support changes in your equipment needs (i.e. Tsunami looks towards the future by allowing you to reconfigure sections of your lid as your needs change. Tsunami is a solid framed lid constructed of interlocking sections. The Tsunami lid - The first lid to feature our patent pending modular interlock design.For those that have an uncompromising desire for minimalist aesthetics the Classic ClearView is still the ultimate 'go-to'. Custom built to order and fully customizable to suit your needs. Machined as a single piece frame directly out of a solid sheet of polycarbonate plastic. The Classic Lid - The lid that put ClearView Lids on the map and started it all.All lids are a polycarbonate lid frame with a mesh center, unless ordered via email as a solid lid.*