Nexus Strike plate keeper, Flat 6.5" length- Stainless
The nexus keeper comes in several styles and heights
Styles: Flat, Raised with wide base, Raised with Narrow base

Length: 6-1/2 inches
Width: 3/4 inch
Height:  1/8 inch thick
Style: Flat

Priced and sold each.
 
Related Truth Parts for Nexus Mortise Lock Keepers:
FLAT Strike Plate Keeper for mortise lock 
33186 - Steel, Flat  6.5" length
33187 - Stainless, Flat   6.5" length

RAISED, wide base 
33194 - Raised, Wide Base Keeper, .60" (15.2mm) Height
33355 - Raised, Wide Base Keeper, .50" (12.7mm) Height

RAISED, narrow base 
33182 - Raised keeper .50" (12.7mm) Height - Steel
33183 - Raised keeper .50" (12.7mm) Height - Stainless
33184 - Raised keeper 1.00" (25.4mm) Height - Steel
33185 - Raised keeper 1.00" (25.4mm) Height - Stainless
33191 - Raised keeper .75" (19.0mm) Height - Steel
33192 - Raised keeper .75" (19.0mm) Height - Stainless