TEN-HIGH 1pcs SK8 8mm Inner Diam Linear Rail Shaft Support XYZ Table CNC Linear Motion Ball Slide Units Series Product Name : Linear Rail Shaft Support;Total Size : 4.1 x 1.4 x 3.3cm / 1.6" 0.55" x 1.3"(L*W*T) Shaft Inner Dia : 8mm/ 0.31";Material : Aluminum Mounting Hole Dia : 5.5mm/ 0.22";Hole Spacing : 33mm/ 1.3" Main Color : Silver Tone;Weight : 26g Package Content : 1 x Linear Rail Shaft Support