6″ fig 602?

Recently, we get an order, and one of these items is Crossover, 6″ fig 602 change to 3″ fig 602. We check FMC catalog and call our Euro agent who has 30 years experience for FMC union, and result is that there is no 6″ Fig 602 in FMC catalog. Max bore size for fig 602 is 4″.  but customer insist that 6″ fig 602 is standard. Now we are waiting for customer to check the equipment he used on oilfield. We will publish the result in our comment after a few days.