This is a six (6) foot roll of 1/2" Inch Flat Cotton Oil Lantern or Oil Lamp Wick. Your oil lamps and oil lanterns never had it so good! If you want to experience the best flame your oil lamp or oil lantern can produce, then these high quality flat cotton wicks are the ones to use. Proper capillary action (the ability of your lamp oil to flow in narrow spaces ((up the wick)) without the assistance of, and in opposition to external forces like gravity) is a key ingredient in producing a bright light, a non-erratic flame, and a clean burn.