feedal 4pcs SK12 Aluminum Linear Motion Rail Clamping Guide Support for 12mm Dia Shaft

Has good performances, low friction coefficients and long usage spans. A linear reciprocating motion for a variety of mechanical systems, since the role of the support or drive, often with the support shaft, with the use of linear bearings. Product Size:42 x 37 x 14mm/1.65 x 1.45 x 0.55" Inside Diameter:8mm/0.31"(Applicable to the optical axis diameter 8mm) Low friction resistance can get high precision rotating in the smooth movement, Weight: 0.24030386558 pounds, Manufacturer: feedal