Hydronix CB-25-1010 NSF Carbon Block Filter 2.5 OD X 9 7/8 Length, 10 2.5 OD and an overall length of 9-7/8 Particle retention size of 10 3 Pack UPC 701003167713 Brand Name Hydronix Unit Count 1.0 Count Item Weight 1.1 Pounds Manufacturer Hydronix Model Number CB 25 1010 Material Type Carbon Number of Items 3 Product Benefits Removes impurities and contaminants with a particle retention size of 10. Manufacturer Part Number CWD-HYDRONIX-CB-25-1010,new+3 Item Dimensions D x W x H 2.5 D x 2.5 W x 10 H External Testing Certification NSF