When extra suction volume is needed, an alternative LCSU 4 version is available. This version has a 800 ml Canister supported by a Wire Stand bracket. The Canister is disposable, it can not be cleaned. The Canister has an internal filter in the lid and mecanical shutoff valve that protects against contamination and overflow. To increase filtration efficiency the Vacuum Tube may be replaced with a High Efficiency Filter Kit. The Kit is used in situations where there is a high risk of cross-contamination.