These T piece fittings are designed for use with Goodridge 600 series -3 hose and fittings. Manufactured from stainless steel and available in 4 different types -Option 1 - 3 way male with a fixing lug.Option 2 - In line compression fittings with a male T off, no fixing lug.Option 3 - In line compression fittings with male T off and fixing lug.Option 4 - In line 3 way compression fittings with no fixing lug.