This is a Case for the iPhone 4/4s. I've been using variants of this case design for the last year, very sturdy yet still a nice slim fit. Simply print, assemble, and snap right on your phone.Print out the parts, assemble, and snap on your phoneNote: when inserting your phone its best to pry open (gently) the sides and slid the top of the phone to the very end. Then simply snap the bottom of the phone in place.MakerBot Replicator Settings:No raft Layer Height: 0.2mm Infill: 100% Shells: 2