This bearing block SSR15XW1UUE is suitable for select Roland printers (see compatibility list). This part includes the block only (without the rail) that corresponds to part number 21895153, that is discontinued, and 21895154. This is the full block with ball bearings mounted in. This block is only suitable for your printer when you use the SSR15 rail. When your printer has an LWES15 linear bearing with LWES15Q blocks, please refer to spare part LWES15C3R220Q.