Product Description Specifications Silicone Pull Plug: Major Dia: 0.335 IN. 8.5 mm; Minor Dia.: 0.157 IN. 4 mm; Length: 1 IN. 25.4 mm; Hole thread: 3/8-16THD; Box Qty: 500 Max Temperature: 600° Major Diameter: 0.335 inch Metric Major Diameter: 8.5 mm Minor Diameter: 0.157 inch Metric Minor Diameter: 4 mm Material: Silicone Color: White