Product Description Specifications Multi-Use Conical Stopper: Color: Green; Major Dia: 0.570 IN 15 mm; Minor Dia: 0.413 IN, 11 mm; Fits: M16; Length: 1.000 IN, 25.4 mm; Box Qty: 500 Max Temperature: 600° Major Diameter: 0.57 inch Metric Major Diameter: 15 mm Minor Diameter: 0.413 inch Metric Minor Diameter: 11 mm Metric Thread: M16 Material: Silicone Color: Green