Barton Size 2 Ball Bearing Mainsheet Tracks 1.8m Hollow section extruded aluminium track for lightweight yet retaining high load capacity. æSpectroÆ grey anodised finish is extremely durable and addsto the friction-free efficient performance of these products. To allow for a smooth profile with no visible fastenings. Also makes retro fit an easier job, as bolts can be slid along the extrusion to match existing fastening holes. Ensure washers are fitted beneath track to ensure a good seal. Width: 26mm Height: 16.5mm Fastenings: 6mm