Product Description Specifications Silicone 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: 600° Major Diameter: 0.51 inch Metric Major Diameter: 13 mm Minor Diameter: 0.25 inch Metric Minor Diameter: 6.4 mm Material: Silicone Color: Clear