... . TBI brand qualtiy guantee. Linear guide shaft TBI brand Dia. 50mm supplied by SNE Application: 1.Optical axis is widely used ... , 15mm,16mm, 20mm,25mm,28mm, 30mm, 32mm, 35mm, 40mm, 45mm, 50mm, 60mm. ( image) , length can cut as per customer's requirments ... us, you are welcome!!! Linear guide shaft TBI brand Dia. 50mm supplied by SNE