2- Fit For Standard Plastic Bottles Which turns coke bottles into beer holders
3-Easy to connect with liquid ball lock or gas ball lock.Used this carb cap in conjunction with a small pond pump to build a recirculating tap line cleaner
4- With 5/16" hose barb that allows it to not only can attach 1/4" hose, but to be used for carbonating water/beer/soda
water/fruit juice.The hose barb can be removed (unscrewed)