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                    | Internal ⌀ | 40 mm | |
| Thickness b1 | 4 mm | |
| Version | wide | |
| Standard | DIN 2084 | |
| External ⌀ | 55 mm | |
| Type of product | Arbor spacer ring | 
| Article number | 309930 40X4 | |
| EAN / GTIN | 4045197307460 | |
| Manufacturer number | 2084B/40X4 | |
| Manufacturer/responsible person | buna Präzision GmbH, Industriestraße 26-28, 73776 ALTBACH, Germany, www.buna.net |