Fluid transfer device

A fluid transfer device comprising:

• a housing having an exterior wall, a plurality of pairs of slots formed in said exterior wall, each one of said pairs of slots being diametrically opposed to each other;
• a needle hub having an exterior wall and an interior wall extending interiorly across said exterior wall, to thereby form upper and lower compartments a first needle extending upwardly from said interior, into said upper compartment a second needle extending downwardly from said interior wall into said lower compartment, said interior wall having an opening therein to form a fluid passageway;
• a first cartridge having a plunger and a pierceable cap;
• a second cartridge having a plunger and a pierceable cap;
• a base member, said member having a base bottom wall, a plunger wall fixedly secured to and extending upwardly from said base bottom wall;
• and
• said arrangement being such that said first cartridge is inserted into said base member such that said plunger seats on said plunger rod, and said second cartridge is in said housing with said pierceable cap of said second cartridge facing said first needle.