Roller Wheel Bracket Assembly Series 80/20 Carriage Height 12.7 mm Carriage Width 25.4 mm Carriage Length 103 mm Carriage Material Aluminum Roller Material Self-Lubricating Black Nylon Agency Compliance - Carriage Finish Clear Anodized Carriage Mounting Hole Size M6 Carriage Type Roller Dimension B 78 in Dimension B1 - Dimension B2 - Dimension F 25.4 in Dimension F1 - Dimension F2 - Dimension F3 - Dimension G 23.45 in Dimension G1 - Dimension G2 - Dimension J 6.4 in