supply of hardness test calibration block size-100mm x 100mm x 16 mm, hardness range:- 250 to 300 bhn, suitable for test method 10 mm/3000 kgf. material:- fine grained homogeneous steel, form:-square, maximum allowed variation of hardness value:- =? 4bhn, accuracy: more than 95%, block should have demarcation line for indentation. block shall have a valid calibration certificate as per din en iso 650/3.hardness test calibration block size-100mm x 100mm x 16 mm, hardness range:- 250 to 300 bhn, suitable for test method 10 mm/3000 kgf. material:- fine grained homogeneous steel, form:-square, maximum allowed variation of hardness value:- =? 4bhn, accuracy: more than 95%, block should have demarcation line for indentation. block shall have a valid calibration certificate as per din en iso 650/3.,hardness test calibration block size-100mm x 100mm x 16 mm, hardness range:- 250 to 3 00 bhn, suitable for test method 10 mm/3000 kgf. material:- fine grained homogeneous steel, form:-squar e, maximum allowed variation of hardness value:- =? 4bhn, accuracy: more than 95%, block should have d emarcation line for indentation. block shall have a valid calibration certificate as per din en iso 650/3. [ w arranty period: 12 months after the date of delivery ] ]