This is the one im planning on purchasing: 'Blaze Glass' Clear Glass Bong - Beaker Base - 5mm - Accessories and Spare Parts - Glass Bongs - Bongs & Waterpipes - Smoking Pipes - Grasscity.com It says the joint size is 18.8 > 14.5 which confused me, i dont know which one it is. The reason i need to know is bc i want to buy this ( Funnel Bowl 14.5 - Cups and Bowls - Accessories and Spare Parts - Glass Bongs - Bongs & Waterpipes - Smoking Pipes - Grasscity.com ) for it and im not sure if that would fit or not. There's an 18.8 size as well i just need to know which one will fit without needing an adapter. Thanks guys!