need a carb for a veco 45 it is old

What is the diameter of the stem, if it has one.

the stem 387thou or 3/8 od it is a old perry

http://www.perrypumps.com/prod01.htm#kb

$39.95<table cellspacing="2" cellpadding="4" border="1"> <tbody> <tr> <td>3501</td> <td>.199</td> <td>.374</td> </tr> </tbody></table>

What w8ye said.

thank you guys