For digital shoe durometers (code ISH-DSA, ISH-DSD and ISH-DSOO), perform repeatable hardness emasurement due to fewer possibilities of human error or measurement variations, special structure for stable loading, weight block A (included) is for ISH-DSA, weight block D (optional) is for ISH-DSD, remove weight block for ISH-DSOO
ISH-DS-STANDATest stand for digital shore durometer