The Gags Idiot Proof! Self Inking Funny Office Stamp for Stupid People In Your Office or Life SELF INKING-Self Inking office stamp makes stamping multiple items a breeze HIGH QUALITY-We use only high quality self inking stamps from Excel Mark or similar quality brands REPLACEABLE INK CARTDRIDGE-When the ink runs out, easily replace the ink cartrdige IDIOT PROOF- This Self inking office stamp is so idiot proof, even a monkey could use it OTHER OFFICE STAMPS-Look for all of our great novelty office stamps, the WTF! Office Stamp, the Really! Office Stamp and our very popular BS Office stamp.