Product Description Specifications EPDM Pull Plug: Major Dia: 0.51 IN. 13 mm; Minor Dia: 0.25 IN. 6.4 mm; Length: 1 IN 25.4 mm; Hole thread: 1/2; Box Qty: 100 Max Temperature: 450° Major Diameter: 0.51 inch Metric Major Diameter: 13 mm Minor Diameter: 0.25 inch Metric Minor Diameter: 6.4 mm Material: EPDM Color: Black