C4 BLADDERReplacement bladder kit including leading edge and strut(s) with valves from a high flow pump plus all hoses, clips and clamps to change all bladders on the kite. Instructions on how to change them are included in the package. Original ozone bladder. Manufactured in the ozone factory in Vietnam. We usually do not have ozone bladders in stock. It's just because its lifespan is limited. All Ozone bladders are made to order so we can be sure the TPU