Ball Mounting Assembly Rail, Rail Material Glass Filled Nylon, Agency Compliance -, Dimension B1 -, Dimension F1 -, Dimension F2 -, Dimension G1 -, Dimension G2 -, Dimension J1 -, Dimension S3 -, Dimension X -, Dimension Y1/Y2 -, For Use With 2HVV8 to 9, 2HVW1 to 4, and 2HWC1 Profile Roller Rails, Includes -, Mounting Hole Center to Center -, Mounting Hole from Shaft End -, Mounting Hole Size -, Rail Finish -, Screw Type -, Series 500 Series, Size -