This item will be shipped within One Week Return is not accepted for this item WSS10x24" Supported Shaft Rail 5/8" Shaft Rail and Length is 24" inch Made in Japan:NB Linear Systems Nippon Bearing Linear Systems NB Part Number Shaft diameter Inch Shaft Length L (inch) Outer Assembly Dimensions (Inches) Base Mounting Holes (Inches) A W 1 W 2 N P WSS 10 x 24" 5/8" 24" 2" 2.5" 0.4375" 2" 4"