With hardness of 92 ± 1 shore , it is available in both regular (25mm ± 1 rubber) & jumbo size (30mm ± 1 rubber). Manufactured using japanese high nitrile rubber & special formulated german rubber chemicals 25-30% more output than other rubber rolls with guaranteed least broken rice . Almost 0% rejection and replacement. Ideally suited for steam rice, arwa paddy for less broken and more output. 19 kgs ( 1 pair) box packing