Dm fit atbc m series tube barb connectors dm fit atbc1210m a tube coupler from the dm fit atbc m series the 10mm barbed end is designed to fit inside a rubberised tube while the rigid 12mm stem fits into a push fit connectorthe couplers are manufactured from safe non toxic materials meeting the requirements of the us fda wras ansinsf 51 61 and sk zert they are widely used in water purification foodbeverage and pneumatic systems dm fit pneufit d atbc1210m pneumatic tube barb connect