1/4" 20 TO 3/8" 16 INCH CONVERT SCREW THREAD ADAPTER F/TRIPOD BALL HEAD QR PLATE. 
3 PIECES; (2) LARGE (5/16) AND (1) EXTRA LARGE/LONG (3/8. SEE PHOTOS). 
THE EXTRA LONG ADAPTER IS NOT AVAILABLE ANYMORE OR AT LEAST I HAVE NOT SEEN IT ANYWHERE! 
THEY ALL ARE IN GOOD USED WORKING CONDITION! 
SOME OF THESE ADAPTERS ARE OVER 25 YEARS OLD, 
MOST EQUIPMENT USED TO COME WITH AN ADAPTER AND I MOSTLY USED THE 3/8-16 TRIPOD 
AND MONOPOD SO I ENDED UP WITH LOTS OF THESE ADAPTERS. 
I DO HAVE MORE THAN THE LISTED OF THE LONG AND X-LONG 
I USED TO THROW AWAY MOST OF THE NORMAL ONES; 
THEY LOOK TOO FRAGILE FOR MY TASTE!!. 
THANKS.

I WILL SOON BE LISTING SOME ITEMS 
I WAS GOING TO KEEP.( ☹ )

TESTED!*

* I HAVE BEEN IN THE PHOTOGRAPHY FIELD FOR 
OVER 35 YEARS AND I PERSONALLY TEST 
EVERY ITEM BEFORE LISTING & BEFORE SHIPPING IT.   
 ALL SERIAL #S RECORDED WHEN SHIPPED. 
PLEASE "NOTE" THIS ITEM IS NOT SET UP FOR BEST OFFER.
NO INTERNATIONAL SALES TO COUNTRIES  
THAT EBAY/PAYPAL DOES NOT OFFER IN-$UR-ANCE-TO!!!!
IF BUYING FROM OVERSEAS PLEASE NOTE,
SHIPPING CAN TAKE UP TO 4 WEEKS. 
IF YOU ARE NOT WILLING TO WAIT, 
PLEASE DO NOT BUY!!!!!!!! 
 IF YOU MUST HAVE VERY DETAIL (STEP BY STEP) 
TRACKING YOU MUST ASK 
(AND PAY THE DIFFERENCE) 
FOR USPS EXPRESS SERVICE!  
PLEASE SEE THE ACTUAL HIGH RES PHOTOGRAPHS 
AS THEY ARE A VERY IMPORTANT PART OF THE 
DESCRIPTION!!!!!!
 ASK ANY AND ALL QUESTIONS BEFORE  YOU BUY.
!!!!!ALL SALES ARE FINAL!!!!!
THANKS.