Product Information:A simpletoinstall system that centers around the Multi Diameter Easy Fit Compression Fittings. They are compatible with any manufacturers 1/2" tubing with outside diameter (O.D.) ranges from .630" to .710"(16 mm to 18 mm). Nobody else in the industry offers a faster, more convenient way to make more drip connections in a lot less time. Rain Birds Easy Fit Fittings has the flexibility to accommodate numerous installation situations with very little inventory.Easy Fit Adapters are not barbed fittings. They are to be used only with Easy Fit Compression Fittings. Features:#149; Fittings that can accommodate virtually any connection situation, great for maintenance and retrofitting existing systems Specifications:#149; Model: MDCFTEE#149; Product number: X43002#149; Tee Fitting