This part has been discontinued and is no longer available by itself. 
This is now available as a full kit with included trim (handleset) here: 302035: Lock + Handleset Kit

This is a Storm Door Mortise Lock body.
Commonly used on Pella, Larson and Wright storm doors, as well as others.

Measurements:
7/8'' Backset
7-1/16" Screw Hole Spacing
7-3/4'' Overall Length
13/16" Faceplate Width
15/16" Spring latch
1-1/16" Deadbolt

Available Colors:
Polished Brass
Brushed/Satin Nickel

Contents:
1 Mortise Lock Body
1 Mortise Lock Strike Plate

Please review additional images

This is not a complete storm door hardware kit.
For a complete Storm Door Mortise Lock and Handle Set see 302035
This item is limited to existing inventory.