Compatible for John Deere 1690, 1890, and 1990 Dual CCS tanks w/100 Bu Tanks. These grates keep foreign materials from getting into your seed tubes. They are easy to install and do not require any drilling. They are proudly made in the USA. 

Each air seeder grate kit comes with grates for both tanks and a removal tool. 

Check out these pictures sent from users showing what these grates have caught. 

Do you have a single 70 bu tank?  You will want this version.  https://newagsupply.com/products/van-well-air-seeder-grates-for-70bu-single-hopper