1、code: 41701, fits 3*4mm tube, vented without filter
2、code: 41702, fits 3*4mm tube, non-vented without filter
3、code: 41701wm, fits 3*4mm tube, vented with filter
4、code: 41702wm, fits 3*4mm tube, non-vented with filter
code: 41701,41702,41701wm,41702wm
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