Best Strategy Critical Print Cleanroom Pens and Markers Black Pen Pack. Combining top-notch and uncompromising quality with an affordable price the Best Strategy Critical Print Cleanroom Pens and Markers Black Pen P1114-6BLK/ 51280-874 can fulfill your laboratory needs while still offering a great value for the money. Product Category Description: Manufactured with very low sodium to prevent sodium contamination. Barrel and cap are made from high-density polyethylene. Specifications for Best Strategy Critical Print Cleanroom Pens and Markers P1114-6BLK Black Pen: Description: Black Pen Unit: Pack of 10 Case of 10 Best Strategy Critical Print Cleanroom Pens and Markers P1114-6BLK Black Pen Pack