Cross Selectip Document Marker Refill, Yellow Highlighter, 1 per card, (8017) We were America's first manufacturer of quality writing instruments, and that means that we've been making pens people use All Cross writing instruments are unquestionably guaranteed against mechanical failure, regardless of age. Cross offers a wide range of ball-point refill sizes and colors; Selectip gel rolling balls, porous-points (felt tips) Yellow Ink Document Marker / Highlighter Refill Authentic Cross Refill