SLA printed in clear blue water washable resin at 100s bottom layer and 14s top layers 100%infill My wife loves them. This is not my design (i didnt make the skulls) I just simple shrank a skull STL punched a hole in the top and ran a thin chain through it (walmart).The entire process costed 6.00$ the cheap jewelry kit at walmart was 5.45 and the skulls costed 0.65c