Columbian Thrust prop identification

[dfrants]

Trying to find out the size and application for a Columbian thrust-o-matic prop model L-4A. diameter and pitch. anyone know these props??? thanks, Don

 

[WesNewell]

Google does.
https://www.google.com/search?clien...ust-o-matic+prop+model+L-4A&ie=utf-8&oe=utf-8

 

[dfrants]

yes, found out that it is a 9"x 10"p for an OMC 18-25 pin drive. and that it is made of plastic!