K-220 The Inflatable Standup Paddleboard (iSUP) super pump. Because we listened to you, we've developed a "taller" version of the K-20 model with all the same great qualities. You'll find it is faster and easier on your back. If you have a "larger" iSUP or just have to be on your board ASAP, the K-220 was created for you. It weighs in at