Product Description Specifications Silicone Pull Plug: Major Dia: 1.38 IN. 35.1 mm; Minor Dia.: 0.5 IN. 12.7 mm; Length: 1 IN. 25.4 mm; Hole thread: 1-3/8; Box Qty: 50 Max Temperature: 600° Major Diameter: 1.38 inches Metric Major Diameter: 35.1 mm Minor Diameter: 0.5 inch Metric Minor Diameter: 12.7 mm Material: Silicone Color: Grey