Two 3 inch purge plugs with diffusers for back purging stainless tubing. They are made of a non-toxic high temp silicone and can handle temps up to 600 degrees F. Has a 1/4 inch brass hose fitting. Stainless merge collector and green hose not included. Made in York, PA. Any questions please ask. Free S/H. Purple – Small End: 2.437″, Large End: 2.953″, Height: 1.375″.