ITEM NAME:Milling Machine SK20 20mm Bore Linear Rail Shaft Support Rod Bracket A2F2 Milling Machine SK20 20mm Bore Linear Rail Shaft Support Rod Bracket A2F2 Package Content : 1 x Linear Shaft Support Material : Aluminum Alloy Color : Silver Tone Net Weight : 83g SK20 20mm Bore Linear Rail Shaft Guide Support for XYZ Table CNC Product Name : Linear Shaft Support Model : SK20 Bore : 20mm Clamping Bolt : M1.5 Recommended Mounting Bolt : M6.4(Screws not included here) Mounting Hole Distance : 44mm/1.74"(from center to center) Size : 60 x 20 x 50mm / 2.4" x 0.79" x 2"(L*W*H) Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm.