From the manufacturer

Magpul’s DAKA GRID Organizer is a fully customizable, drop-in organizational solution that secures and protects your important equipment when it’s stored or transported in your existing hard case. Specifically designed to fit the Pelican 1720 Protector Case, the Eylar 44” gun case, and other 1720 case clones, the GRID Organizer is completely reconfigurable to meet your storage needs. Individual Expanded Polypropylene (EPP) Panels and Blocks nest together securely to maximize protection, versatility, and ease-of-use. They can be organized to brace and immobilize rifles, optics, ammunition, accessories, and any other gear you need to take with you, and they can be quickly removed and reinstalled for your next loadout. The lightweight GRID system uses compression to immobilize and compartmentalize your gear, firmly holding it in place and providing advanced protection from damaging shocks and impacts. The result is less movement and better impact resistance for your gear than you’ll get from current open cell foam options that allow your gear to slide around inside your case during transport. Also, the GRID’s EPP material doesn’t absorb contaminants the way open cell foam does, providing resistance to liquid and chemical intrusion and mitigating contamination of your gear. Cleaning up dirt, chemicals, and liquids is easy with just a damp cloth. Offering numerous advantages over traditional foam and expensive laser-cut inserts, the GRID provides intuitive, modular organization at your fingertips. It’s reconfigurable without tools, so it can be adapted to your loadout in seconds. If you’re carrying wider or taller equipment such as lights, bipods, or lasers, a center GRID Panel can also be cut down in size or removed to open up space for objects up to 4.25” inches wide as long as you brace both ends of the firearm on the other panels. If you end up needing to cut a Panel to create a unique cavity for your wider gear, the EPP cuts smoothly, doesn’t flake like regular foam, and doesn’t lose its strength or ability to protect your important equipment. Simple to configure, stronger than foam, and versatile enough to change with every loadout, the DAKA GRID Organizer makes your case more secure and more functional. Includes four GRID base Panels, six triple Blocks, six double Blocks, and replacement base foam.