P-329 MAIN SPRING: 5/8″ wide, 5/16c, Pear Both Ends, 2″ Barrel

P-329 SPRING: 5/8″ wide, 5/16″ center arbor, both ends have pear shaped holes, in 2″ coil. Please note: Springs are NOT returnable. Extreme caution must be used when working with mainsprings! Not responsible for damages or accidents!