Bronze cap with external threads is 1 3/4" neck , 2 3/4" overall- number 32 inside-$25============SOLD============== Bronze cap with internal threads is marked C16 and F22- $20 Bakelite pointed cap is 1 3/4 " internal , 2 3/4" overall, unused?-$45-now $30 plus shipping Smooth Bakelite cap is 2" internal , 2 3/4" overall, unused?-$45-Now $30 plus shipping All are plus shipping Send zip in Private message USPMO or check , cash Thanks Roy