Legris 0127 10 07 Brass Tube Support, 7. 5 mm Sleeve OD x 10 mm Tube Diameter. Normally closed double female axial valve for remote control of circuits. Brass tube support fits inside tubing to prevent deformities at high temperatures and pressure. Tube sleeve presses inside of compression tubing. Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability.