GS hardness Hardness models use of methods of shape A GS-719N standards of the most popular, mainly used to measure the general hard rubber front of a diameter of 0.79,35 ° 2.50 mm high GS-719G-type home GSD-719H few explicit GS-719L feet long GSD-709L digital - GS-709N Standard GS-719G-type home D GS-720N standard for hard tip R0.1, 35 ° 2.50 mm high GS-720G-type home GS-720H-deep hole GSD-720H few explicit GS-720L feet long GSD-720L feet long GS-702N Standard GS-702G-type home E GS-721N standard for a soft radius of 2.50 mm Hemispherical 2.50 mm high GS-702G-type home GSD-721 digital - SRIS GS-701N standard diameter of 5.08 to 2.54 mm soft radius Hemispherical high 2.54 GS-701N-type home GS-701 digital - (Old) A GS-706N standard general-tip diameter 0.79,35 ° High 2.5 mm radius 2.50 Hemispherical high 2.5 mm GS-706G-type home GSD-706 digital - (Old) C GS-703N Standard GS-703G-type home E2 GS-743G home-type soft radius 2.50 Hemispherical GSD-743 digital - F0 GS-744G home-type soft foam Mo with a diameter of 25.2 2.5 mm high GSD-744 digital - B GS-750G home semi-rigid needle with tip diameter 0.1,35 ° GSD-750 digital - C GS-751G home hard to pin-tip diameter 0.79,35 ° 2.5 mm high GSD-751 digital - DO GS-752G home-use soft-tip radius of 1.19. Hemispherical high 2.5 mm GSD-752 digital - O GS-753G-type home GSD-753 digital - OO GS-754G-type home GSD-754 digital -