Need help identifiying a roller lifter.

My buddy had a lifter break on his sbc last fall and has it apart now. He just needs one lifter and is having trouble identifying what he has now. Any help would be appreciated.

them would be comp

Thanks Pat, would you know the Comp part number to get the same ones?

that is just the super roller lifter 818 or if small base 891

Thanks again Pat. I will let the buddy know.