Full disclaimer; I know absolutely nothing about lube pumps. These are from a friend's estate. All proceeds will go to his wife.

I find no markings on any of them so I have no idea who made them or may have modified/added to them. Look closely at the pictures as they will be the best description of them. 

#1)
      Two heads with inserts. Bullet measure ~ .257 tapering to        
       .253 & .993 long, ~.322 tapering to .317 & 1.128 long. 
      $100.00, including postage.

#2
      Two heads with one insert. Bullet measures ~ .338 tapering 
       to .332 & 1.240 long. $75.00, including postage.

#3)
      Bullet measures ~ .375 tapering to .370 & 1.150 long.
      $50.00, including postage.

#4)
      Bullet measures ~ .256 tapering to .253 & .998 long. 
      $50.00, includes postage.

Buy them all for $200.00, postage included.

Payment by USPS Money Order, or personal check upon my approval. USA sales only.