Freeflow Tube Sets for your softside waterbed! Comfortable and easy to install. Fill from your sink to your desired level of firmness and carry to your mattress. Optional capability of filling and/or draining inside the mattress cavity if a Fill and Drain Kit is used. Tubes are pre-packed with Conditioner Tablets. Water conditioner would need to be added each year to validate the warranty. Top fill for convenience in filling, draining or removing excess air. Superior Lap seam technology. Fits most cylinder bed constructions for a 4 inch depth. Eco-Friendly vinyl exceeds US and European standards. Durable 18 mil vinyl thickness.Measurement of inside dimensions of foam tray is recommended to ensure proper tube size and fit.