I don't know what kind of steel it is, but it looks more like aluminum. I cut off the remaining foam, cut a 5l plastic canister from the primer - the edge was notched.
To provide a more detailed representation of my experience, I have attached some photos to my review.
Black BAOFENG UV-5R Dual Band Two-Way Radio
68 Review
📻 Baofeng Pofung UV6R 2-Way Radio Transceiver, Lightweight 1.1 Pound
6 Review
📻 Get Connected: BAOFENG BF-888S Two-Way Radios - Double Pack
11 Review
High Power Tri-Power Portable Baofeng UV-5R Two Way Radio for Ham Radio Enthusiasts
62 Review
Ultimate Fitness Tracker: Xiaomi Mi Smart 🏋️ Band 6 - 1.56'' Offers Unmatched Features and Performance
78 Review
6 Pcs Reflective Bands: High Visibility Running Gear For Women Men - Safety Straps Bracelets For Running, Cycling & Walking
46 Review
Foxelli Wading Boots: Lightweight, Rubber Sole Fly Fishing Shoes For Men - Grey
47 Review
Portzon Women'S Waist Trainer: Weight Loss, Sweat Belt, Sauna Trimmer, Tummy Toner, Lumbar Support
47 Review