drylin® W linear rails were developed to promote design flexibility and quick assembly. They have numerous advantages over comparable ball bearing systems. The iglide® plastic lining generates up to four times less noise than metal bearings thanks to a lower coefficient of friction. They are also dry-running, removing the need for grease or other external lubricants which can cause dirt and dust adhesion when used. drylin® bearings can perform consistently in dirty or dusty environments with no maintenance necessary.