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LEGO part 91968c01 - Black Train Buffer Beam with Sealed Magnets - Type 2 (flat bottom) at BrickScout
HMANE 10Pcs Train Parts and Pieces Black Train Wheels for RC Trains, Train Wheel, Train Buffer Beam with Sealed Magnets Compatible with Lego : Toys & Games
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Old Elementary: A brief history of LEGO® magnets | New Elementary: LEGO® parts, sets and techniques
![BrickLink - Part 91968c01 : LEGO Train Buffer Beam with Sealed Magnets - Type 2 (flat open bottom) [Train] - BrickLink Reference Catalog](https://img.bricklink.com/ItemImage/PL/91968c01.png "BrickLink - Part 91968c01 : LEGO Train Buffer Beam with Sealed Magnets - Type 2 (flat open bottom) [Train] - BrickLink Reference Catalog")
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LEGO TRAIN CHASSIS WITH WHEELS, BUFFERS & MAGNETS 4560 4561 | #518486802
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![BrickLink - Part 91968c01 : LEGO Train Buffer Beam with Sealed Magnets - Type 2 (flat open bottom) [Train] - BrickLink Reference Catalog](https://img.bricklink.com/ItemImage/PN/11/91968c01.png "BrickLink - Part 91968c01 : LEGO Train Buffer Beam with Sealed Magnets - Type 2 (flat open bottom) [Train] - BrickLink Reference Catalog")
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New 3rd party magnetic train couplers [and micromotors too] - LEGO Train Tech - Eurobricks Forums
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LEGO Train Buffer / Connector x2 w/Sealed Magnets 91994 29085c01 Magnetic Joiner | eBay
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