Technically, none. A jack is the hole that you insert an earbud plug into. The two common sizes are 2.5 millimeters (mm) and 3.5 mm. Most have the 3.5 mm size. Unfortunately, many cell phones are now coming with the small 2.5 mm size jacks, and 3.5 mm earbud plugs will not fit.
There are websites that will check all the places that sell an item online then give you a comparison on pricing to see what is the best deal. For a single earbud here is a site that compares prices: www.nextag.com/single-earbud/compare-html
Is it an earbud, because if it is than yes. It should fit regardless, but most likely if it is an earbud.
That depends on pen. There are many models manufactured with different ball sizes.
Speaker, headset, earbud.
The tip is the section of the shaft which goes into the head of a club. Different club heads have different tip sizes so can only take certain shafts. The most common tip sizes are .335 inches and .350 inches.
A welding torch as opposed to a cutting torch is more appropriate . Welding torches accommodate a variety of tip sizes designated by a number and have only one orifice (hole) for the flame. The smaller the number the smaller the tip orifice (hole) and a smaller flame. Larger numbers means larger hole sizes and larger flames. Sizes start at 0 and can be as large as 40 or more. The size of the tip is determined by the thickness of material to be welded/brazed. Thin materials would call for a small tip size, thick materials would need a larger tip size.
The size of the needle and the size of the tip should match unless you are using bugpin needles, in which case the tip should be two sizes smaller than the needle.
Using a single earbud is perfectly safe at a reasonable volume level. Do not turn the volume up too loud or else you will risk irreversible damage to your ear.
To insulate the wires
A service tip is simply called a 'tip' or 'gratuity' and one pays a waitress; waiter; bell boy in a hotel, etc., if their service is good. A service tip is generally 15% of the total bill, but can be less. If the service is poor then one can decide not to leave a tip.
There are many brands which make wireless earbud headphones, including Plantronics, LG, Motorola, JLAB, Denon, Outdoor Technology, Jaybird, Koss and Altec- Lansing.