Drop-messenger-operated closing mechanism Back Catalog number: 438520 Availability: In the manufacturer's stock Price on request - + Recommended 438416 V-Fin Depth Depressor with steel rope and shackle Price on request A136-01A 1" Butterfly Valve kit (316L) with EPDM seal Price on request 438212 Net Part for Neuston Net, mesh size 300microns Price on request