This soft sided 1 ounce bottle comes with two twist on plastic tips which are interchangeable. The blue tips.43mm and the pink is .62mm. These tips allow quillers to usea minimalamount of glue so it doesn't show even on the narrowest strips. It is best to keep the bottle at least 3/4 full so it is easy to squeeze and control. We store this bottle right side up with the pin in the tip and get no clogging. Tips can be washed in warm soapy water if necessary.