The 3 1/2" (89 mm) diameter Guidi bronze cover cap with two holes is a specific cover cap used for sealing 3 1/2" openings on, for example, tanks or pipes. This cover cap is made of bronze, a material known for its durability and corrosion resistance, making it suitable for marine applications.

The deck cap has two holes designed to hold the cap firmly in place and ensure a good seal. These holes can be used to secure the deck cap using bolts, screws or other fasteners, depending on your specific application.

When installing the Guidi two-hole bronze cover cap, it is important to ensure that the cap is placed firmly and correctly on the opening to ensure a good seal. Also check that the 3 1/2" diameter matches the requirements of your application.

Guidi's 3 1/2" diameter bronze cover cap with two holes offers a reliable and practical solution for sealing openings on marine systems. Consult the product information and specifications of the deck cap to confirm its suitability for your specific application.