Albin Group Marine Active Carbon Filter [03-66-011]Active Carbon Filter Prevents outside odor coming from tank by connecting it at the highest point along the breather hose. Specifications: Weight: 0. 15 kg . 25 lbs Type: Black water Adjustable Ports: With 16, 19, & 25mm (3 8, 3 4, 1) *Certification: CE marked 94 25 ECC, ISO8846 Small Craft, Electromagnetic compatibility 89 336 EEC, EN51014 1993 radio disturbance