• SSR20 XWQZSS | SSR20XWQZSS• Weight: 0,237, Lubrication & Maintenance: With lubrication system, Series: 20 series, Version: Small design, Preload: Normal preload, Seal: End seals, sealing strips and inner seals, Tolerance class: THK normal class, Temperature range: -20 to +80 °C, Design: Block carriage, Type of rolling elements: Balls, Ball-/Roller rows: Four-row, Ball chain: With ball chain, Material: Steel, plastic