3.25" Silicone Purge Plugs for Tig Welding Sanitary Stainless Steel (2 Plugs) They are made of a non-toxic high temp silicone and can handle temps up to 600 degrees Fahrenheit. They have 1/4" hose fittings. Also includes 1 stainless hose clamp. Green Plugs:Small End: 2.677", Large End: 3.228", Height: 1.500" Made in York, PA. Any questions please ask. Free Shipping and Handling. They will fit schedule 10, 40 and 80 on 3 inch pipe.