Nanuk 918 Customized Replacement Insert Foam 6 Lens. This solution is ideal if you are seeking a quick and easy way to protect and organize your Revolvers. This foam fits the Nanuk 918 hard case. It also comes with the eggshell foam that goes in the lid of the case. Specifications for Nanuk 918 Customized Replacement Insert Foam: Manufacturer: Nanuk Color: Black Size: Medium Country of Origin: Canada Package Contents: Nanuk 918 Customized Replacement Insert Foam Nanuk 1-918-19337: 918 Customized Replacement Insert Foam 6 Lens