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Pair of X501 connectors for attaching particle pre-filters (X7N11 P2 or X7N13 P3) onto Oxyline chemical filters (X701, X702, X703). They extend the system's protection by adding dust and particle filtration. Compatible with X6/X7 half-masks and X8 full-face mask.
The link between chemical filters and particle pre-filters
The X501 connector is the intermediate piece that allows you to attach particle pre-filters (X7N11 P2 or X7N13 P3) onto Oxyline chemical filters (X701 A1, X702 A1E1 or X703 ABEK1). Without it, the pre-filters cannot be secured to the filtration system. Sold in pairs of 2 units (one connector per side), since each mask uses two side-mounted filters. Compatible with the X6 and X7 series half-masks and the X8 full-face mask.
The complete filtration system is assembled without tools in under a minute: chemical filter (attaches to the mask via bayonet) ← X501 connector (clips onto the filter) ← particle pre-filter (locks into the connector). The sequence is always the same regardless of which filter or pre-filter model you use. The connector is reusable: when you replace worn pre-filters, the connector stays in place.
If you only plan to use chemical filters (e.g. X703 ABEK1 for oxalic acid sublimation), you do not need the connector: the filter attaches directly to the mask via bayonet. The connector is only necessary when you want to add a particle pre-filter on top of the chemical filter, which is recommended when handling oxalic acid crystals (they generate dust) or when working in environments with airborne particles.
| Reference | X501 |
| Type | Connector / adapter for pre-filters |
| Units per pack | 2 (1 pair) |
| Compatible pre-filters | X7N11 P2 R D, X7N13 P3 D |
| Compatible filters | X701 A1, X702 A1E1, X703 ABEK1 |
| Compatible masks | X6 and X7 series half-masks, X8 series full-face masks |
| Reusable | Yes — stays in place when replacing pre-filters |
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Pair of X501 connectors for attaching particle pre-filters (X7N11 P2 or X7N13 P3) onto Oxyline chemical filters (X701, X702, X703). They extend the system's protection by adding dust and particle filtration. Compatible with X6/X7 half-masks and X8 full-face mask.
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