Material:high carbon chromed bearing steel, Gcr15.
Hardness: HRC602
Surface hard thickness: 0.8u~3mm
Accuracy: G6
Outer diameter: 20mm
Optional Length: 200mm; 300mm; 400mm; 500mm

Axis Shaft Support Specification:
Inside Diameter: 20mm (Applicable to the optical axis diameter 20mm)
Size : 60 x 20 x 50mm / 2.4" x 0.79" x 2"(L*W*H);

Linear Ball Bearing Specification:
Model: SC20UU
Inner Diameter: 20mm
Overall Size:50mmx54mmx41mm（LxWxH）
Color: Silver

Package include:
2 x Optical Axis
4 x Linear Rail Support
4 x Linear Ball Bearing