3/8 inch tubing required for a condensation pump. Need to pump condensation furnace water to washer drain. Routed the tubing across rafters and into the drain. The pump will be connected during Winter months due to patio drain freezing. Anticipate that this clear vinyl will carry the water up and out to inside washer drain. The tubing arrived in a cardboard box rolled up with clear wrap around the tubing, it unrolls quite easily.