Lees Wood Airstone Air DiffuserLees Wooden Air Diffusers are manufactured from an all natural lime wood. Each diffuser is precisely hand cut against the grain of the wood to allow for maximum output of super fine bubbles to be released from the micro pores of the wood. Natural micro pores in wood poduce super fine bubbles Increases the efficiency of air driven protein skimmers Hand cut against the grain for maximum bubble output Lees Wooden Air Diffusers are the ideal diffuser for