Check the listing for details. McKissock Marker, Keyhole Pattern, 42 mm Diameter, Premium. Condition: New. Listed at 15.95 USD. Indelible Ink, 42 mm Diameter, Keyhole Pattern, Premium Quality by Norralco This high-quality McKissock Marker from Norralco is specifically designed for the meticulous marking needs of plastic surgery. Engineered in Germany, the marker features a 42 mm diameter nib ideal for precise, detailed markings. Its keyhole pattern ink delivery ensures a steady flow of indelible ink, perfect for surgical applications. The product with the MPN 'NORRALEARNK' is a testament to Norralco's commitment to excellence in medical instruments. The brand is renowned for its robust and reliable markers that cater to the demands of the surgical discipline. This product, in particular, is tailored to meet the needs of professionals seeking a premium marking instrument.