Wheel balancing apparatus; wheel balancing apparatus utilising computers; wheel balancing instruments; wheel balancing machines; testing apparatus for wheels; wheel alignment measuring apparatus; wheel alignment measuring instruments; wheel alignment meters; mechanical measuring apparatus; automatic indicators of low pressure in vehicle tyres; balance testing machines for tyres; testing devices for tyre assembly machines; tyre gauges; tyre matching apparatus; tyre matching instruments; tyre monitoring apparatus; tyre monitoring instruments; tyre pressure gauges; apparatus for checking the temperature of vehicle brakes; appliances for regulating power actuated brakes; bleeder kits for testing brakes; induction brakes for measuring the capacity of engines; induction brakes for measuring the power of motors