4pcs LM6LUU 6mm Long Type Linear Ball Bearing Bush Bushing 6*12*35mm for DIA. 6mm Linear Shaft Rod DIY CNC Long Type Linear bearing ball cage, hardened coat of both ends ring. Bearing various parts of the size is standardized, interchangeable, no worry if replacement of worn Low noise even in high-speed operation. Size: 6*12*35mm(0.24*0.47*1.38 inch),Color: Silver Package content: 4pcs x LM6LUU long type ball bearing