Grace Glass G1634 This fantastic Grace Glass bong offers one of the best cooling performances due to its unique double honeycomb disc percolators. The design also offers a new type of stem which is integrated into the main chamber not only offering a special look but also a stronger union between the two pieces. The ice notches provide further cooling giving you one of the best hits you can experience. With 5mm thick glass you can be sure of the superior quality in this awesome bong. Perfect for smoking your favourite smoking blend. Size: Height – 43 cm Diameter – 50 mm Socket – 18.8 mm Material: Glass Colour: Green percolator and bowl. Grace Glass GG logo in black.