WWW.DDC-DIY.COM For Product Demonstrations Under Blog. Your order comes with 6 Fiberglass Wick Thermal Glass Tubes And 6 Pieces of 1/8" x 5" Fiberglass Wick. 1/4" Diameter Hole For Tube needed. Stem length 3/4" Long. Glass holder for oil rock candle, lamp adapter, and mason jar candle. These thermal glass wick tubes have a variety of uses. Many people make rock candles. I have made a mason jar candle from these by just drilling out a mason jar lid to the diameter of the glass tube measured at the base. Just add oil and you have an improvised oil candle for mood lighting or emergencies. (18)