Product Description Specifications EPDM Pull Plug: Major Dia: 0.53 IN. 13.5 mm; Minor Dia: 0.25 IN. 6.4 mm; Length: 1 IN 25.4 mm; Hole thread: 33/64; Box Qty: 100 Max Temperature: 450° Major Diameter: 0.53 inch Metric Major Diameter: 13.5 mm Minor Diameter: 0.25 inch Metric Minor Diameter: 6.4 mm Material: EPDM Color: Black