Insulating gloves made from non-conductive natural rubber combining high dielectric and physical strength to offer excellent electrical resistance. Certified to EN60903 they offer the highest level of electrical protection available. Every pair is electrically tested to meet the requirements of the standard prior to release for sale. No gloves of classes 1 2 3 and 4 should be used unless they have been tested within a maximum period of six months. The tests include air inflation to check for air leaks a visual inspection while pressurized and a dielectric test in accordance with EN60903. For classes 00 and 0 a check for air leaks and a visual inspection may be considered adequate however a routine dielectric test may be performed at the owner's request. These gloves are anatomically shaped flexible and durable offering maximum comfort and superior performance. Typically used for electrical maintenance installations and wiring. Rubber insulating gloves are classified according to the level of voltage and protection they provide. Class 0: Maximum working voltage 1000V.