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 -  Tuesday, January 27, 2009
Rubber?
Reviewed By: Katy 
No exactly sure why this is classified as rubber, it seemed like very hard plastic but did work okay for the water experiment we had to do. Turns out, I didn't even need to purchase this separately as it comes in the basic experiment package available for grade 4, which we purchased a while back, so we now have 2 rods.