Base 275 Call For Quote $2.08 Interior Base 7/16″ x 3-1/4″ View Product Catalog Base 275 quantity Add to list Want a discount? Become a member. SKU: 275 Category: Mouldings Tag: mid-century modern Description Description Mid-Century Modern Clamshell base, a genuine clamshell of the 1950’s. H275 – Hemlock, 7/16″x3-1/4″ available in random lengths