Please choose the correct ending to complete the given sentence: Health: [header] How to make a reusable, inexpensive, and efficient gravity bong [title] Identify the usable socket sizes. [step] They are between ½ " and 5/8 ", or 12 to 15 mm in diameter. [title] Using the mouth of the water/soda bottle, test the fit of the socket.

Ending1: [title] If the socket is fitted snugly, it will come out tough. [step] There should be a good bend at the nut. Ending2: [title] Wrap masking tape around the sides of the socket to make a sufficiently airtight seal. [title] Add layers of tape as to ensure a snug fit. Ending3: [step] If it fits snugly, inflate the socket until it is. 050 in diameter, and leave to cure. Ending4: [step] Put the bottle on a hard surface. If it doesn't fit you can just tighten the socket by slowly and then tightening the socket just a bit.

Answer format: ending1/ending2/ending3/ending4