Hydroponic Dual Layer Flexible Hose Cooltube 4mm X 30meter
Sent with Tracking in unmarked packaging
Cool your nutrient by up to 10% and increase dissolved oxygen by 20%
compared to blackflexi/poly hose.
Dual Layer black inner, white outer construction.
(To help with connect fitment, dip tip of hose into hot water to soften plastic before fitting connection).