120mm x 3.5mm (4.75″ x .125″) Black ESD-Safe Rubber Band | MC-CRB2
Medium-length black ESD-safe rubber band measuring 120mm x 3.5mm (4.75″ x .125″) for reusable retention of IC tubes, JEDEC trays, protective boxes, and static-sensitive packaging.
Approximately 475 bands per 1-kilogram poly bag. Static dissipative, RoHS compliant, and REACH compliant.
Black ESD-Safe Rubber Band MC-CRB2
The Black ESD-Safe Rubber Band MC-CRB2 is a static-dissipative rubber band measuring 120mm x 3.5mm (approximately 4.75 inches x .125 inch). Its medium-length, narrow profile provides flexible, reusable retention for IC shipping tubes, JEDEC trays, protective boxes, component kits, and other static-sensitive packaging.
MC-CRB2 bands are manufactured from impregnated natural rubber and have a controlled surface-resistivity range of 1 × 104 to 1 × 106 Ω/square. They are intended for applications where a lower-resistance static-dissipative retention band is specified or preferred as part of the customer’s ESD-control program. The lower resistance range does not automatically make the band appropriate for every application, so selection should consider the complete packaging system and applicable ESD-control requirements.
MC-CRB2 Specifications
| Malaster Part Number | MC-CRB2 |
|---|---|
| Metric Size | 120mm x 3.5mm |
| Nominal Inch Size | 4.75″ x .125″ |
| Measurement Method | Dimensions measured lay flat |
| Color | Black |
| Electrical Classification | Static dissipative |
| Surface Resistivity | 1 × 104 to 1 × 106 Ω/square |
| Material Construction | Impregnated natural rubber |
| Elongation at Break | 500% minimum |
| Approximate Bag Quantity | Approximately 475 bands per 1-kilogram bag |
| Documentation | RoHS and REACH documentation available |
About the MC-CRB Designation
MC-CRB is retained as a legacy Malaster part-family identifier for continuity with customer purchasing records, approved material lists, drawings, and historical specifications. These products may therefore still be described as conductive rubber bands in older records and common search terminology. Current MC-CRB products are classified as static dissipative, not conductive.
Typical Applications
- Bundling IC shipping tubes and component carriers
- Retaining stacked JEDEC trays and protective packaging
- Holding protective boxes and component kits securely closed
- Organizing work-in-process materials within production areas
- Reusable retention during manufacturing, storage, and shipment
Storage and Inspection Guidance
Keep MC-CRB2 bands in their original packaging until needed and reseal opened packages when practical. Protect the bands from direct sunlight, ultraviolet exposure, excessive heat, ozone-producing equipment, oils, solvents, contamination, and prolonged storage under stretch or compression. After opening, plan to use the bands within 9 to 12 months and apply first-in, first-out inventory practices.
Inspect bands before use and replace any showing cracking, hardening, tackiness, discoloration, surface damage, deformation, or loss of elasticity. For ESD-critical applications, resistance should be verified as part of the customer’s qualification and ESD-control process.
Published properties and approximate package quantities support product evaluation but do not replace customer qualification, incoming inspection, lot verification, or an approved drawing when one is required.
Compare ESD Rubber Band Options
Review the complete Malaster rubber-band family, compare pink and black material properties, or request help selecting a size for your packaging application.
| Weight | 2.4 lbs |
|---|---|
| Dimensions | 9 × 6 × 4 in |
| Bag Quantity | Approximately 475 rubber bands per bag (1 kilo). |
| Material | Black Static-Dissipative |
$68.000
Available on backorder
| Quantity | Price |
|---|---|
| 0 - 5 | $68.000 |
| 6 - 10 | $64.600 |
| 11 + | $61.880 |
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