8 Pcs 14”x16” Expanding Foam Packaging for PC & Irregular-Shaped Items - Shockproof Expandable Packing Foam, Protective Computer Shipping Material for Electronics & Fragile Devices

They do work great, exactly what I needed. I wish they expanded a bit more, but for what it's worth they do the trick. They are very easy to use, if you can't figure out how to use them after watching the video then it's strictly user error. Caution they do get warm after expanding, so I would warn that once it expands and forms you should remove it from your item and let it cool down.

These worked well when I shipped my PC from Japan back to the states Beware when placing in tight corners it can push components apart it did dislodge my GPU from the port (no damage) just reconnect And it did bend some pins on the mother board but they were RGB fan pins I dont use Don't force it in tight areas or overly pack more bags into the case like I did (User error)

Purchased for a large shipment I did. Pros: - Easy to use - Expands to an adequate size (roughly 3-4 inch vertical expansion) - Compaction Protection is adequate Cons: - HEAT! These packs, once activated get pretty hot. - Fast curing time. Once activated, you have about 30 seconds max to get it placed where you want. - The plastic can get punctured on sharp items. In my opinion, just have a plan for positioning before activating and delicate handling when placing.

They worked as advertised but they are way smaller than you think they are going to be. When mine expanded the foam didn't fill the entire bag and it only expanded a max of 3 inches. This overall makes them quite expensive.

Exactly what I needed and exactly what was shown. I used all of the packs to help protect my computer for an international move and it protected everywhere that I put the material. I used 3 of them for the internal space of my computer but I'd recommend going a bit larger for external protection if you want to use less of them.