The Pulsar RIP Knuckle Rig Bubbler is perfect for both guys and girls who love taking their oil rigs outdoors. Whether you're at a picnic or a camping trip, this rig is a joy to use. It's 6.5 inches tall, made of indestructible silicone, and is 100% BPA - free. The unique knuckle duster handle gives you a great grip, and it has all the necessary components like a 14.5mm female glass diffused downstem and a 14.5mm male terp vacuum banger. With removable concentrate storage, it's very convenient for on - the - go use.