P-337 MAIN SPRING: 7/8″ wide, 5/8c, Pear Both Ends

P-337 SPRING: ⅞” wide, .026″ thick, 5/8″ center arbor with pear shaped hole, outside hole is also pear shaped, in 3″ coil. Please note: Springs are NOT returnable. Extreme caution must be used when working with mainsprings! Not responsible for damages or accidents!