15" 7mm Bubble Tube - Clear They’re thicc and they’re chunky and that’s how we like ‘em. These Red Eye Glass® chunky 7mm & 9mm bubble base tubes are exactly what the doctor ordered. We’re not sure if this doctor is licensed or not but we’re a fan. With extra thick mouthpieces and female ground joints, these bongs are ready to rumble! Product features: - 7mm thick - 100% borosilicate glass What's included: 1 x 15" 7mm Bubble Tube 1 x Pull-Out with Built-In Screen 1 x 14mm Clear Flush Mount Diffuser Downstem