New Siemens Size 2 LIFE/Slim Tubes. Two tubes per pack, one left and one right tube. Select size you currently have. Size is indicated on the tip of the tube where the dome is placed. They are also color coded, red for right and blue for left. If you happen to wear different sized tubes on each ear (e.g. size 1 on left ear and a size 2 on right ear), please contact seller prior to ordering. Dome tips (aka Siemens Life-Tip Domes) are sold separately. View images carefully and contact seller for assistance if needed.