Overview Reviews Product Description Expansion plugs also known as frost plugs, welsh plugs or freeze-out plugs. Papco® expansion plugs are made of heavy gauge plated steel or solid brass to resist rust. Papco Automotive Catalog Product Videos Custom Field Box quantity 12 Size 1-3/4" Product Reviews Write a Review Write a Review × Paulin 1-3/4" Zinc Plated Cup Type Expansion Frost Plug 12 Pc. 260-204 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *