ATEX THREE-PHASE IND. VACUUM CLEANER A21X1.3D-A22X1.3D A21X1.3D-A22X1.3D is best choice for any work in industrial atmosphere. It is three phase flameproof vacuum cleaner, and ideal for multi work in all kind of conditions. The models A21X1.3D-A22X1.3D are smart, well designed, handy, noiseless and have capability with side channel blower and can work for long hours. The best part is its size one can adjust it anywhere.