Product Description Specifications EPDM Pull Plug: Major Dia: 0.388 IN. 9.9 mm; Minor Dia: 0.157 IN. 4 mm; Length: 1 IN 25.4 mm; Hole thread: 3/8; Box Qty: 250 Max Temperature: 450° Major Diameter: 0.388 inch Metric Major Diameter: 9.9 mm Minor Diameter: 0.157 inch Metric Minor Diameter: 4 mm Material: EPDM Color: Black