Aopin LM16UU Cylinder Linear Motion Ball Bearing, ID 16mm, OD 28mm Linear Ball Bearings Sae52100 Carbon Steel, 4 Rows of Steel Balls, Great for CNC, 3D Printer, Linear Rail Guide 2 PCS sold2024 High Quality Transmission Round Belt

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Aopin LM16UU Cylinder Linear Motion Ball Bearing, ID 16mm, OD 28mm Linear Ball Bearings Sae52100 Carbon Steel, 4 Rows of Steel Balls, Great for CNC, 3D Printer, Linear Rail Guide 2 PCS sold2024 High Quality Transmission Round BeltAopin LM16UU Cylinder Linear Motion Ball Bearing, ID 16mm, OD 28mm Linear Ball Bearings Sae52100 Carbon Steel, 4 Rows of Steel Balls, Great for CNC, 3D Printer, Linear Rail Guide 2 PCS Precision Steel Ball The card slots are neatly arranged in 4 rows of steel balls, smooth rolling, stable operation, low friction and low noise. Carbon Steel Material, Reliable, Durable and Safe Linear ball bearings are made of durable high carbon steel, high strength