Product Description Specifications EPDM Tapered Plug: A: 0.437 IN 11.1 mm; B: 0.25 IN 6.4 mm; Length: 1 IN 25.4 mm; Box Qty: 500 Max Temperature: 450° Major Diameter: 0.437 inch Metric Major Diameter: 11.1 mm Length: 1 inch Minor Diameter: 0.25 inch Metric Minor Diameter: 6.4 mm Material: EPDM Color: Black