Compatible: This fountain filter is only compatible with NPET WF020/WF020TP pet fountain
Material: Food grade Resin + Activated carbon
Function: Filter impurities, remove odor.
Color: Two colors will be sent to customers randomly. White + Black + Blue (old) ; White + Black (new).
Size(L*W*H): 4.7 x 1.1 x 0.8 inches (single filter)
Specification: 6pcs per selling box ; 10pcs per selling box
1. Rinse the filter with water about 10 mins before use.
2. Replace the filter every 4 to 6 weeks. It depends on filter status.