Rings too thick

#1
Just got some Sterns piston rings ( 500-017) for my 3.5 flathead briggs. Mod 91202

The stern ring # 500-017 number does transfer to the correct briggs ring # 298982

However the sterns rings in the box are way too thick! the sterns pressure rings are 1/8 to 3/16 inches thick. They will not fit in the piston groves !

The factory rings are only 1/16 or so thick.

Any ideals ?
Think these rings got in the wrong box?
 
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