An allergy testing tray assembly has an outer tray and an inner tray fitted in the outer tray. Each one piece tray is molded to have three longitudinal areas separated by two rows of spaced posts. A plurality of allergy testing needles are removably held between the adjacent posts. These syringes each have needle protective housing and a sheath that covers the needle prior to use color coded to reflect the gauge of the needle of the syringe. The plunger end of each of the syringes is capped so that each syringe is isolated from the environment. The trays are sealed by a cover sheet that may also have markings in the same color as the color of the housing and the sheath, so that a clinician can readily tell the gauge of the needle of the syringes stored in the trays, without having to remove the cover sheet. Once the tray assembly is sterilized, the sterility of the syringe are doubly protected by the sealing of the needle end and the plunger end of the syringe as well as the sealing of the trays from the environment by the cover sheet.