Prima Klima Carbocone K4601-125 is a cylindrical activated carbon exhaust filter for 125 mm ducting. It uses a patented conical inner basket to promote even carbon saturation and reduce pressure drop, supporting longer service life and stable performance. The filter measures 625 mm in length (without flange) and 200 mm in body diameter, and is rated for a maximum airflow of 600 m³/h. It is filled with 5.5 kg of CTC65 grade carbon and weighs about 7.8 kg in total. A K3701 prefilter sleeve is included to trap dust and extend carbon life. Designed for odor control on extraction lines in small to mid‑size grow setups, it pairs well with 125 mm inline fans.