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10PCS 688ZZ Bearing 8 x 16 x 5mm Grade P4 Miniature Ball Bearings 688Z for 3D Printer Heatbed: Amazon.com: Industrial & Scientific
Amazon.com: 10pcs High-Speed Ordinary Motor deep Groove Ball Miniature Small Bearing 688ZZ 688-2Z Inner Diameter 8 * 16 * 4mm Thick 4mm (Size : Motor) : Automotive
uxcell 688ZZ Ball Bearing 8mm x 16mm x 5mm Double Shielded 688-2Z 2080088 Deep Groove Bearings, Carbon Steel (Pack of 20): Amazon.com: Industrial & Scientific
Amazon.com: TONGCHAO Professional 10PCS 688ZZ Bearing 8 x 16 x 5mm Grade P4 Miniature Ball Bearings 688Z for 3D Printer Heatbed : Industrial & Scientific
Deep Groove Ball Bearing, 10pcs 686-ZZ 687-ZZ 688-ZZ 689-ZZ Metal Shielded Bearing Made of Steel Material(689-ZZ 9x17x5mm): Amazon.com: Industrial & Scientific