The SEBS-B slide guides are said to have a radial clearance that's 2 × more accurate than the typical guide. The all-stainless models come in retained-ball or lower-cost nonretained-ball lines in ball sizes from 2 mm and rail lengths from 104 to 1,000 mm.
NB Corp., 420 Shannon Rd., Deerfield, IL 60015, (800) 521-2045, nbcorporation.com