The Sargent NB-8710-84-J is Less Bottom Surface Vertical Rod Exit Device, No Outside Operation Exit Only, The NB-8710-84 has an 84" high single point top latching, with a 37"-42" rail (J) and comes In US32D/630 Satin Stainless Steel And US10B/613 Oil Rubbed Bronze Finish.
Features
Single point top latching
Top latch bolt projection adjustable through center case
ANSI/BHMA A156.3 - Grade 1
UL10C (Fire) and UL305 (Panic) Listed
Tripping potential removed - no bottom strike
Rods are 1/2" (13mm) brass, bronze, or stainless steel