07421 Steinel plastic welding rods abs black 16 per pack 018139074212 16 Pieces. Dimension - 9 x 1.5 x 0.4 in. Item Weight - 0.11 lbs. Excellent Quality. 7421 factory warranties its heat guns and glue guns for a period of one (1) year from the date of purchase, if properly operated and maintained and used under normal conditions. For heat guns, this warranty are tools that have been subject to abuse, tools that have been opened or repaired by anyone other than factory, tools that have been modified in any way or mounted onto machinery/equipment, and tools that have been put into continuous operation. heat tools are hand held power tools and are intended for use as such. Any other use voids warranty.