2001 Roadtrek Window Thickness

I am replacing the Glazing Bead on the three front windows on a 2001 RT 190P. I found a place that has the material but they need to know the thickness of the glass. The choices are 1/8 inch and 3/16 inch.

Does anyone know the thickness of the windows. I have sent an e-mail to Roadtrek but have not received a reply yet. TKS.