Base Cap 425 Call For Quote $1.23 Interior and Exterior Base Cap Fir, 11/16″ x 1-11/16″ View Product Catalog Base Cap 425 quantity Add to list Want a discount? Become a member. SKU: 425 Category: Mouldings Description Description Classic Portland base cap. F425 – Fir, 11/16″x1-11/16″ available in random lengths.