The Title Boxing Rubber Speed Bag Bladder is an extra durable replacement bladder that is also super lightweight. The bags are affordable enough to keep around a few replacements so you don't have to slow down your workout. Get your replacement speed bag bladder now and experience a quality, durable speed bag bladder you will love.<ul><li>This is an upgrade to the plastic version</li><li>Extra durable replacement bladder</li><li>Replaces easy, holds air well and can really take a beating</li><li>Keep 2 or 3 around for emergencies</li><li>Super lightweight</li></ul> <b>Sizes:</b></u><u></u><ul><li>Small (Fits Bag Sizes 4&quot;x7&quot; and 5&quot;x8&quot;)</li><li>Regular (Fits Bag Sizes 6&quot;x9&quot; and 7&quot;x10&quot;)</li><li>Large (Fits Bag Sizes 8&quot;x11&quot; and 10&quot;x12&quot;)</li></ul>