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Compact refill roll of white polyester labels printed with black number 7, self-adhesive backing

3M

3M SDR-7 Wire Marker Refill Preprinted Self-Adhesive Black on White

SKU CH-FHXV-N22AR

Preprinted self-adhesive polyester labels marked “7” on white, 576 pieces per roll for 6/0–24 AWG wire, –40 °F to 250 °F range

  • TypePolyester Film Back
  • ColorBlack on White
  • Preprinted legend 7 speeds wire identification
  • Self-adhesive acrylic backing stays fixed in place
  • Polyester film resists temperatures from -40 to 250 °F
  • Thin .003 in profile fits 6/0 to 24 AWG wire
  • 576 labels per roll reduce refill frequency

Wire Marker Refill for Electrical Identification

This 3M SDR-7 refill roll supplies 576 pre-printed polyester labels in a black-on-white format. It is designed for electricians, technicians and installers who need quick, legible circuit identification on site or in the workshop.

Temperature Resistance and Thin Profile

The acrylic-adhesive polyester film operates from minus 40 degrees up to 250 degrees Fahrenheit. Each label measures only 0.003 inches thick and 0.22 inches wide, adding negligible bulk while staying readable in harsh thermal environments.

Self-Adhesive Markers for Wide Wire Range

Labels stick directly onto conductors from 6/0 down to 24 AWG without extra fasteners. The roll fits the standard STD dispenser, so users can pull and apply markers one-handed during termination or maintenance work.

Highlights

  • Preprinted legend 7 speeds wire identification
  • Self-adhesive acrylic backing stays fixed in place
  • Polyester film resists temperatures from -40 to 250 °F
  • Thin .003 in profile fits 6/0 to 24 AWG wire
  • 576 labels per roll reduce refill frequency

Specifications

Brand3M
ModelSDR-7
TypePolyester Film Back
ColorBlack on White

Questions about this item

How do I install the SDR-7 refill into an STD dispenser, and what step is often missed?

Thread the polyester film roll into the STD dispenser so the adhesive side faces outward, then advance the first label to verify the legend feeds straight; skipping that test feed causes misaligned markers on the wire.

What will need replacement after the 576 preprinted legend 7 labels are used?

The refill roll itself is consumed after all 576 labels are applied; the STD dispenser is reusable and only requires a new SDR-7 roll to continue marking.

At what temperature does the acrylic adhesive reach its limit during sustained use?

The acrylic adhesive is rated to 250 degrees F; prolonged exposure above that temperature is the first limit that can cause bond failure on the polyester film labels.

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