You are buying 1 (ONE) NEW 1" DIAMETER by 12" LONG GREEN FLUORESCENT TRANSLUCENT EXTRUDED ACRYLIC TUBE. (One inch x Twelve inch). This tube has a 1/8" thick wall which provides an outside diameter (OD) of 1" and an inside diameter (ID) of 3/4". As you can see from the picture of the tube on the black grid, these tubes are clear translucent. The last 2 pictures are of the tubes being held in front of a FLUORESCENT BLACK LIGHT The tubes will glow ONLY when in the influence of a fluorescent black light or Actinic type light. In normal light conditions the tubes are a vibrant green. The color of the tubes might vary a bit depending on the back round color due to being translucent. You are buying and will receive ONE 1" OD x 12" long fluorescent translucent GREEN tube. To assure that you get the finest quality, the protective sleeve is kept in place on the rods while being cut to protect the acrylic. All tubes have saw cut edges on both ends. Saw cutting can cause micro chips on the ends of the tube as seen in the pictures. Please allow a length tolerance of +/- 1/16" on all cuts.