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Amazon.com: PBC LINEAR, Shaft, Aluminum, 0.500 In D, 12 In, Pack of 5 : Industrial & Scientific
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Amazon.com: Bearing& Support,Ideaker Horizontal 8mm Dia Linear Motion Ball Bearing Slide Bushing &400mm Linear Shaft Optical Axis with Rod Rail Support Set of 16 : Industrial & Scientific
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uxcell 16mm Shaft Support SK16 Linear Motion Slide Rail Guide Blocks for CNC 3D Printer (Pack of 2): Amazon.com: Industrial & Scientific
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