Circular design with a small footprint enables labeling in tight places. Patented cellular inking process ensures clear, consistent results. Spring-action, retractable configuration facilitates mess-free use. High-impact plastic construction provides excellent durability. Refillable stamp is pre-inked for up to 100,000 impressions. Stamp Type: Message; Message(s): OK; Ink Types: Pre-Inked; Re-Inkable; Self-Inking; Number of Lines: 1.