Plik1818 Here

Several equipment manufacturers use "801818" or similar variations for protective covers. For example, Jacks Small Engines lists a Recoil Grip Cover

Covers are 16 gauge carbon steel. * General. Accessory Type. Cover. For use with NEMA 1 screw cover wall-mount enclosures. SC1818. Powerhorse 801818 Recoil Grip Cover - Jacks Small Engines Powerhorse 801818 Recoil Grip Cover - Jacks Small Engines. Jacks Small Engines Polyethylene Cover for R081818 - Gilmore-Kramer plik1818

The term may relate to protective covers for electrical or storage units. Gilmore-Kramer offers a Polyethylene Cover plik1818