Loading block for 8 shot Ruger Sp 101 22 revolver Fits Pelican Micro Case 1040 and 1050 (PELICAN CASE NOT INCLUDED) One block fits in the Pelican 1040 Micro case: two blocks stack in the Pelican 1050 Micro case. Load up close the lid toss it in the range bag head to the range. Pelican Case keeps the rounds secure no more spills. Pelican 1040 case requires a little bit of shim to keep the rounds secure use about a 3/8 to 1/2 inch of weather stripping in the bottom and your all set. Double stack the Pelican 1050 Micro case no shim required your good to go. This is a great why to keep everything nice and neat.