Amazon.com: ZXUEZHENG 3Pcs Surgical Tip Markers Skin Marker Pen Tattoo Pen(0.5mm,1mm) with Paper Ruler (2 Single Head +1 Double Head) : Industrial & Scientific
Amazon.com: MediChoice Skin Marker, w/Ruler and Labels, Sterile, 1314077734 (Box of 25) : Industrial & Scientific