Breath Fresh Charcoal Scavenge System. Activated charcoal canisters remove up to 50g of waste anaesthetic gas. They attach to 19mm scavenge hose. Inexpensive refills available. Lasts 12-15 hours of anaesthesia. Simple to use: connect and ready to go. Suitable for mounting on anaesthesia machine pole. Dimensions: 15 cm (H) x 7.5cm (D), Weight of active components: 200g. Complete Starter Kit includes Mounting Bracket, Breath Fresh Canister and Scavenge Tubing. When canister is expired simple dispose and replace or refill.