5

I bought a bulk box of LEGO and about 10% were mega blocks. I am unsure of these pieces. They seem to match in color

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7

These are the Blocked Open Stud variants of

Part # 2453a : Brick 1 x 1 x 5 - Blocked Open Stud or Hollow Stud

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and

Part # 2454 : Brick 1 x 2 x 5 - Blocked Open Studs or Hollow Studs

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0

Yes, they are hollowed stud 1 x 1 x 5, and hollowed stud 1 x 2 x 5 bricks.

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