This is a model specific insert for the Plano rifle ammo case Model 122950.
Find it on Amazon here

https://www.amazon.ca/gp/product/B0042WIA40/ref=ppx_yo_dt_b_asin_image_o05_s00?ie=UTF8&psc=1

It is a 50 round case for the 308 family of cartridges. The case was designed to fit the larger WSM cartridges also so when I put my 6.5 creedmore rounds in there was lots of room for the cartridges to wiggle around.
This insert keeps the 6.5 creedmore cases snug and is a simple drop in and take out. When the case is closed the insert will not move or shift positions.
This insert should work for all 308 family of cases.
Notches on the insert face the front of the Plano case

Creality

CR10S PRO

No

No

100%

Print out of you choice of material at 100% infill.