Spec-Wipes Spec-Wipe 7 Wipers Pack. Combining top-notch and uncompromising quality with an affordable price the Spec-Wipes Spec-Wipe 7 Wipers 21913-214/ 21913-214 can fulfill your laboratory needs while still offering a great value for the money. Product Category Description: Excellent for cleaning rough abrasive or irregular surfaces yet soft enough for delicate surfaces. Use these 100percent interlock knit polyester wipers where low particle and fiber contamination are most critical. Appropriate for use in electronic semiconductor aerospace pharmaceutical medical device research and education industries. No-run interlock knit provides durability for vigorous cleaning. Edges are sealed for reduced lint and fiber. Laundered in an ISO Class 4 (FED-STD-209E Class 10/M2.5) cleanroom to further reduce particulate and extractable contaminants. Specifications for Spec-Wipes Spec-Wipe 7 Wipers 21913-214 : Dimensions cm (in.): 22.9 x 22.9 (9 x 9) Unit: Pack of 100 Particle Generation (>=0.5 m) Biaxial Shake: =0.5 m) Fibers (>=100 m/cm2):