C-310A Aluminum Basement Insert - Monarch Replacement with Expander / Adaptor

Columbia Series C310A Aluminum basement window replacement insert with insulated glass.
Maintenance Free, Energy Efficient, Easy, no tools required, 1 minute Installation.
Needs no tools to install -- uses high tensile steel spring clips to secure the insert in the opening.
Expander allows for use in most Concrete Basement walls with poured in place steel buck frames.
Colors: Mill Aluminum finish (standard), or white or bronze painted finish available at additional charge

IMPORTANT -
The Monarch was slightly smaller than Columbia and the Expander is added to the bottom of insert
The expander creates a 5/8 in. thick leg that fits into the Steel Buck Frame.

Note: Basement inserts with expanders are used with Steel Frames, Aluminum Frames do not need the adapter.

Standard Sizes
31 x 12-3/16 + Expander = 12-5/8
31 x 16-3/16 + Expander = 16-5/8
31 x 20-3/16 + Expander = 20-5/8
31 x 36-3/16 + Expander = 36-5/8 egress