Firefly Brand - 5 Feet of 2.6mm Round Braided Eco Cotton Replacement Wick for Oil Lamps and Candles. Made in USA ROUND COTON OIL CANDLE WICK: This 2.6mm wick (1/10 wide) is used in all Firefly Oil Lamps with the exclusion of the Pillar Candles which use the 3.6mm Wick. Round Cotton Replacement Eco Wicks for Oil Lamps, Lanterns and Candles. 5 Ft. long. We Cut the Wicks to 5 ft. in our Facility. Minor Shrinkage Can Occur. SPECIAL NOTE: If you are using the wick in a non-Firefly Oil Lamp, please call the manufacturer of your oil lamp to determine the correct replacement wick size. The Material is Cotton. 2.6mm = 1/10 of an inch. These wicks are intended for Oil Candles and Oil Lamps. The cotton replacement wicks are NOT intended for Tiki Torches or Wine Bottles which Require a Larger Wick. TOP QUALITY COTTON ECO WICKS: Our Company Niche is Lamp Oil, Oil Lamps, Lanterns and Candles. Be sure to scroll down to "PRODUCT INFORMATION". To the right of the page you will see "Technical Specifications". There you will find our Users Guide". DESIGNED FOR USE IN: Oil Lamps, Lanterns and Candles Requiring a Round Wick that use Petroleum-Based Fuels. The fuel source you use should be a high-quality lamp oil like Firefly CLEAN Lamp or Paraffin Lamp Oil. SPECIAL NOTE: The wick is not intended for use with Vegetable Oils. Please completely soak the wick before using; otherwise, you will burn the wick and not the fuel which will make you sad.