K-Pump 400The K Pump 400 Inflatable Standup Paddleboard pump is a larger version of the K 40 model with all the same great qualities but delivers about 40% more air volume per stroke in both stages. You'll find it is faster and easier on your back. It weighs in at around 5 lbs. and is 31 inches tall. This enables you to stand more upright when filling you board. Unique two stage design lets you add air in a hurry then top off to high pressure with minimal