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Internal sensor lever is sensor configuration for MMU2S printers. This replaces bulky external chimney with internal lever.

You may alternatively use the cumbersome Prusa chimney, but Bunny Science internal sensor lever is sleek and allows full opening of idler door.

2 x 5 x 10mm magnet from Prusa MK3S sensor system

MR63ZZ Miniature Steel Bearing 3x6x2.5 mm

Internal sensor lever for MMU2S

M2 x 16 mm BLACK STEEL ALLOY screw cap hex screw. This screw MUST be strongly attracted to magnet. Stainless steel will not work. Also, use cap head here for needed compactness.

Optical interruptor bar should be printed in opaque color, preferably black.

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