Wilkins: 4″ – First or Second Check Module for a:
 
     • 1st or 2nd Check: 450ST  Double Check Assembly
     • 1st Check: 450STDA  Double Check Detector Assembly
     • 2nd Check: 475ST  Reduced Pressure Zone Assembly
 
Kit Includes:
Check Module and Retainer Clip
Weight 64 oz
Dimensions 6 × 6 × 6 in
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