Adult Tray, Sterile, Includes: Spinal Needle With Stylet, 20G x 3_", 5" Extension Tube, 3-Way Stopcock, Two Piece 550mm Manometer, 22G x 1_" Infiltration Needle, 4-10mL Specimen Vials & 4 Patient ID Labels, 10/cs (648)Ultra sharp spinal needles for smooth insertion and greater patient comfort. Precisely calibrated manometer with well defined markings for visula acuity; Luer slip fitting assures quick and leak free connections. Prenumbered vials for accurate specimen identification. Latex free.