2CA Twin Shaft Web RoundRail Linear Guide System The 2CA Twin Shaft Web RoundRail Linear Guide features the new patented Super Smart Ball Bushing® bearings with up to 216X the life or 6X the load capacity of conventional bearings. The 2CA Twin Shaft Web is ideal for spanning or bridging a gap and its double LinearRace Shafting and welded integral web design maximizes torque and dramatically improves deflection characteristics. Pre-aligned for quick and easy installation, the 2CA Twin Shaft Web is designed to move medium loads with virtually frictionless travel. The 2CA Linear Guide comes in three versions: 2CA Twin Shaft Web Universal Carriage Industry Standard Inch 2CA Twin Shaft Web Universal Carriage Industry Standard Metric 2CA Twin Shaft Web Flanged Integrated Carriage Industry Standard Inch