Impact Bead for High Sensitivity Nebulizer with Pt/lr or Tantalum Capillary for PerkinElmer AAnalyst 100/300/700/800, 5100 PC, 5000,3300, 3110, 3100 4100, 2100, 1100(B)and earlier AAs. Included with High Sensitivity GemTip Nebulizer only. Inert plastic body with red adjusting ring