Humidifier Pad Compatible Grainger Part Number 31TP24 31TP25 Compatible Manufacturer Model Number 400 400A 400M Overall Depth 1 3/4 in Overall Height 10 in Overall Width 1 3/4 in Overall Length 13 in Material Paper Coating Anti-Microbial Agent Antimicrobial Yes Includes Water Panel Pack Quantity 2 Product Type Water Panel Evaporator Package Quantity 2