The 300 Series Bristol smooth paper is an economical heavyweight board ideal for finished artwork. Smooth surface Bristol is best used for mechanical drawing and with media including pen and ink, marker and airbrush. This tape-bound pad holds 20 sheets of quality, acid-free Bristol.Details:WhiteAvailable in multiple sizes100lb/270gsm12 pads (20 sheets per pad)Tape-bound padAcid freeSmooth surfaceHeavy weightFor use with pen and ink