FeaturesFluorescent markerUniversal ink for use on most papers including fax and NCR paperLonger writing length and increased 4 hour cap-off time2-5mm line widthWater-based inkThe Stabilo Green Boss Highlighter (Pack of 4) has all of the same features as the BOSS original but with a green conscience. It is manufactured using 83% recycled plastic. These long-lasting highlighters can be refilled. The highlighters fit perfectly into your pencil case and have an incredible four-hour cap-off time. The highlighter can highlight and underline in two line widths, 2 and 5 mm and for approximately 375m. This pack contains yellow, green, orange and pink highlighters.