ORA Electric Roller Replacement Needle Heads Set features three replacement heads compatible with the ORA Electric Microneedle Roller Derma Pen System. These adjustable heads give you the flexibility to switch to different needle depths from 0. 25mm to 2. 00 mm and help take the guesswork out of microneedling whilst providing deeper needle penetration. Please note: Needle heads set is not compatible with the Microneedle Derma Pen System. | Beauty ORA Electric Roller Replacement Needle Heads Set (3 Piece) | Dermstore