RBS Pro 6061AL Tri AERO RD4 bar made of Aluminium 6061 — O/S 31.8 mm bars with detachable extensions. Fully CNC machined brackets for precise alignment and rigidity. Armrests horizontally adjustable by 17 degree (toe in & out). Horizontal extension length adjustable by 100 mm, S bend or J bend available. Five vertical height adjustments for optimal comfort. 440 mm center to center. Sand blasted & anodized ﬁnish.