GEH 20 SA (EGH 20SA)SHAC GEH 20 SA Compact Linear Guide Block (EGH 20SA) The SHAC GEH 20 SA compact linear guide block is the short body version of the GEH 20 series, matching the EGH 20SA pattern used by other brands. It runs on SHAC GEH 20 rails and is ideal for small CNC and automation axes where space is limited but accuracy is important. SHAC is made in China yet delivers machining quality and smoothness comparable to Taiwanese guides, clearly above typical Chinese