The Type RSR1M and Type RSR2M (2 to 4 mm rail width) were developed in response to today's increasing demand for decreased design sizes. The ultra-compact RSR Series features minimal rolling resistance and four-way equal load ratings. Martensitic stainless steel blocks, rails, and balls allow for use in harsh environments. Type RSR heights range from 2.5 to 4 mm, block widths are from 4 to 10 mm, and block lengths range from 6.2 to 17 mm. Basic dynamic and static load ratings are 37 to 307 N and 58 to 435 N respectively.