sirsi am mr. marcelino durán, from quito equator, need this type rotary blades of. it is for pet bottle crushing equipment.the specifications of the material and part are the attached document package.any suggestion of change or tempering material, we are interested.i also send of crusher graphics.my webpage is www.tritubot.comi tempered and ground require the piece to be our minimum order is 500 pieces please let us know if interested production time, (delivery) prices, port. thank youneed your for send mail teh grafics Show More