HK -24 Four-point bending Grip Application:Used for Four-point flexure test for glass specimens Grip support/pressure point diameter:R1.5mm or R3mm , Test specimen width 200mm, height is 70mm, test span of the upper fixture 100mm adjustable, total length 170mm.test span of the Lower fixture 150mm adjustable, total length 220mm.Minimum test span 10mm.