[Boston Blackie]

Boston Blackie may be a dummy but is not the author of the article. 2 pounds (psi) means 2 pounds per square inch.

[bert]

oops.... Jeff is the igmo

pounds of air is weight

pounds per square inch is pressure

Jeff’s usage is incorrect because he is ignorant on the subject

[showme_the_Glory]

Boston Blackie may be a dummy but is not the author of the article. 2 pounds (psi) means 2 pounds per square inch.

Wow, I thought the balls weighed 12 1/2 lbs, like a medicine ball. /s