Spec-Wipes Spec-Wipe 7 Wipers Case. Combining top-notch and uncompromising quality with an affordable price the Spec-Wipes Spec-Wipe 7 Wipers 21913-216/ 21913-216 can fulfill your laboratory needs while still offering a great value for the money. Product Category Description: Versatile all-purpose wipers are ideally suited for dust collection monitoring and control work. Either use the wipers unrolled as is or twist off the wiper head to use the entire length. The nonabrasive wipers are ideal for sampling airborne particulates and nonabrasive cleaning of balances and records. The wiper heads are coreless pliable wipers made of breathable material that wont fall apart when exposed to air for long periods. They wont cause dust collection blockage due to molds or bacteria. Spec-Wipes are individually wrapped and are constructed of breathable material that wont become crinkled or stiff after use. Feature Pliable all-purpose wipers that will not fall apart when used as directed. Each wiper contains a reusable valve that allows the user to cut the wiper head to fit a particular application need. Specifications for Spec-Wipes Spec-Wipe 7 Wipers 21913-216 : Dimensions cm (in.): 30.5 x 30.5 (12 x 12) Unit: Pack of 100 Particle Generation (>=0.5 m) Biaxial Shake: =0.5 m) Fibers (>=100 m/cm2):