Pilot SCA-6600 Jumbo Marker Chisel Broad Thick Tip Nib 10mm Red Box 12DescriptionSpecificationsShipping Pilot Jumbo Permanent markers have large chiselled nibs, and are filled with ultra permanent Pilot brand ink One really nice feature about these is that they are easily refillable with Pilot Ink and the nibs are built so well that these markers last The 10mm nib is built tough and can write on more surfaces than most markers Pilot Jumbo markers also have a large ink capacity so you dont have to refill them as often