TRIMPAC® Model B-3 & B-3B Single Interlock Preaction System with Electric Release TRIMPAC® Pre-assembled Trim
TRIMPAC® Model B-4, B-4B, & B-4S Single Interlock Preaction System with Pneumatic Release TRIMPAC® Pre-assembled Trim
TRIMPAC® Model B-5 & B-5B Double Interlock Preaction System with Electric/Pneumatic Release TRIMPAC® Pre-assembled Trim
TRIMPAC® Model B-6 & B-6B Double Interlock Preaction System with Electric/Pneu-Lectric Release TRIMPAC® Pre-assembled Trim