The Canon Lens Trunk 300 is made to carry a Canon EF 300mm f/2.8L IS USM Lens. It is a replacement case for the original supplied with the lens.
Reviewed by 1 customers
I got my case with my new 300mm 2.8 L IS II. The case fairly cheap plastic that I would never put on the bottom of a pile of cases, nor trust in any significant drop. The inside is molded nicely. That is fine if you are only taking it out of your trunk, but I travel a lot. On the outside it says: "Lens Case 300B Canon," which to me is akin to: "steal me, I'm worth a lot of money." Also, this is a one lens case. When I travel, I do not just take the 300. For the price you can buy a Pelican 1510, which will fit in an overhead bin and will hold a lot more than just this lens (e.g. 70-200, TC's, 16-35, and a 50, a 1DX, etc). Also, the Pelican is much less obvious, is virtually indestructible, and you can put 2 combination locks on it (versus a cheap 1 key one built into the Canon case).