Abstract: A syringe kit for mixing two medicinal fluids includes first and second barrels adapted to contain medicinal fluids therein. The first barrel includes a connecting tube portion at a tip portion thereof having a male screw on an outer periphery, and an inner tapered surface on an inner periphery. The second barrel includes a nozzle portion at a tip portion thereof having a screw tube portion with a female screw on an inner periphery thereof freely engageable with the male screw, and an outer tapered surface fitting to the inner tapered surface on the inner periphery. At least a surface of the male screw and the outer periphery of the connecting tube portion of the first barrel, or a surface of the female screw and the inner periphery of the screw tube portion of the second barrel are roughened to a surface roughness in a range between Ra1.0 and Ra2.0.

Abstract: A medicine syringe has a syringe barrel, piston and plunger rod. The syringe barrel is provided with a cylindrical main body defining therein a chamber to be filled with a medical solution, and an injection nozzle portion formed at an end portion of the main body and defining therein a hollow bore in communication with the chamber. The chamber and hollow bore have a total capacity of not greater than 0.5 mL. The chamber and hollow bore are formed such that the piston is slidable in a range of from 20 to 100 mm and is allowed to slide liquid-tight into the hollow bore beyond the chamber.

Abstract: A rubber plug for a vial container includes a leg portion press molded independently, and having a base end side portion, and a plate-shape cap portion bonded to the base end side portion press-molded with the leg portion. The leg portion and the plate-shape cap portion have bonding areas formed as concentric concavo-convex areas. The base end side portion of the leg portion including the area bonded with the plate-shape cap portion is formed of a material same as that of the plate-shape cap portion.