I bought this for another teacher in my department after years of continued great service from the inertia ball I have. The inertia ball that arrived is exactly like the one I previously purchased, but does not match the one in the photo. Here are the rough measurements: ~1.75 kg, ~78 mm diameter, the eye hooks are only about 13.5 mm outer/6.4 mm inner diameter. This sphere works great for inertia demonstrations and as a pendulum demonstration when hung from the ceiling.
Reply
SARGENTWELCH.com associatePublished 08/17/2017
Thank you for sharing. We're happy to hear that these inertia balls are consistent with your previous purchase.
"Item sent nothing like photograph" - The inertia ball that I was sent is too small to be used for physics demonstrations. Also the ball sent looks nothing like the one illustrated.
We are currently unable to calculate your contract price for this item. List price is being displayed temporarily. When your order is processed, you will be invoiced at your contract price even though list price is displayed now