Material quality:stainless steel.
Provent ink from leaking

 Stamp pad Sealer & Pad-edge Sealer

After electric heating edge sealing, stamp pad with a chapter of shell fuses together in together, from a chapter of shell the oil filler oil injection, stamp face only then the writing and the graph only then has the printer's ink to seep out;

The seal edge sealing most saves the printer's ink, will not waste, will save 25% compared to the immersion oil injection, will be clean, simple, quickly.