From which set is this bag? All grey 1x1 round bricks and 2x2 domes I received this bag together with a used set. It is bag number 1 and it says copyright from 2007. The content is &gt;10 of round 1x1 bricks and 2x2 round dome bricks, in dark bluish gray and light bluish gray each.
These are very useful parts, but I wonder whether it is better not to open it when it comes from a valuable set.
Jncraton found it in 42055. Bag(s) 1 contain the dump truck and the debris.

However, I don't know why the bag says &quot;2007&quot;.
That's got to be the bag of aggregate from Bucket Wheel Excavator (42055).