With mounting holes or without for individual machiningEasy adjustment and positioningMaterial: Aluminium, clear anodizedSize: 80We offer matching cover caps for all drylin N linear rails:NS-01-17/NS-01-17-AR 🠖 NSKB-17NS-01-27/NS-01-27-AR 🠖 NSKB-27NS-01-40/NS-01-40-AR 🠖 NSK-40NS-01-80/NS-01-80-AR 🠖 NSKB-80