DC-4 Hygroscopic Breather 1. With standard thread, easy to replace the ordinary breathing cap; 2. Micron filter cloths ensure no solid contamination. 3. When the absorbent is full of water, the color changes from blue to pink. 4. Activated carbon absorbs oil mist from the system. 5. The case is made of high-strength plastic and can withstand temperatures up to 90 degrees. 6. For closed systems only;
