Pellet grills have their beginnings in pellet stoves. Sawdust may make particle board or be pressed into wood pellets for pellet stoves. This is one reason why softwood pellets (for pellet stoves) are popular. Corn kernels are used as pelletized fuel for pellet stoves and furnaces. It is a similar process to forming a wood pellet but on a larger scale. Maximum allowable temperature of the fuel pellet is . These are measured with a 0.20 gram pellet. In direct drive, the laser blasts a pellet of fuel. Rodents therefore often produce a hard and dry fecal pellet. Typically, a pea-sized pellet of RDX is used. Packaging of pellet gums can vary from boxes to bottles to blister packs. This is achieved by formulating capsules using the multiple-unit pellet system. One mechanism is a small meltable pellet that holds down a spring. After centrifugation the supernatant solution is removed, leaving a "pellet" of crude DNA. The pellet of the barred owl averages about in diameter and in length.