1960-69 deep dimple lifters, set of 12 heavy duty lifters made in the USA. The deep dimple lifters help keep the push rods in place, they are superior to the cheaper light dimples ones. Don't forget to check the push rods  for bending when you replace  your lifters.  Feel free to contact Rafee at 918-753-2486 with any questions you might have about this item.