Catalog

Pre-Assembled Interior Window Trim

Picture Frame Design • Casing applied 4 sides to extension jamb

Stool Cap Design • Casing & Stool Cap applied to extension jamb. • Apron shipped long and loose or cut to size w/5° mitre.

Extension Jamb & Stool Sizes (Applicable to Harvey and Marvin windows)

Description

Harvey & Marvin

5/8″ × 2 11/16″ 5/8″ × 4 3/16″

4 ⅝″ Extension Jamb Stool

6 ⅝″ Extension Jamb Stool 5/8″ × 4 11/16″ 5/8″ × 6 3/16″ Note: When ordering, TTT (Tip-to-Tip) dimensions must be provided to ensure proper sizing.

Jackson LUMBER & MILLWORK

A

1.

181

July 2026