... ; 4. TBI brand qualtiy guantee. Linear guide shaft TBI brand Dia. 20mm supplied by SNE Application: 1.Optical axis is widely ... another is hollow cylinder linear shaft. cylinderlinear rail series: including Dia. size 6mm, 8mm, 10mm, 12mm, 13mm, 15mm,16mm, 20mm,25mm ... requirments, from 100-6000mm, we sugguest customer accept max length 3000mm. Easy for packing and transport. When you require longer than ...