General description The 3X Filter Carbon Fiber is designed for use with air purifiers AP-1009CH, AP-1008DH, AP-1012GH, and AP-4072DH. This filter set includes essential components to enhance air purification efficiency. Technical specifications Color: Black + Green Material: Plastic + Cotton Package Contents: 3 primary carbon cotton filters, 3 HEPA filters Measurement allowed error: +/- 1-3 cm