GROCO Backing Block f/3/4" 1" Seacocks [BB-1]Backing Block for 3 4" & 1" Seacocks Features: Each size fits multiple seacock sizes Press threaded brass inserts into the hull side of the backing block into the holes that match the seacock flange Rigid 1 2" thickness provides secure installation but is flexible enough to conform to minor hull curvature Will not swell or absorb moisture Made from an environmentally friendly PVC foam specially formulated for marine applications Specifications:

Rated Watts: 12

A micromachined 3-axis rate gyro is used

Box Dimensions: 5"H x 13"W x 15"L WT: 16 lbs

Has transparent housing and stainless steel mesh filtering screen

Box Dimensions: 2"H x 5"W x 13"L WT: 1 lbs

Accomodates both Talon & Humminbird 360 Imaging

Reverse polarity protected

3 Stage charging (Bulk

Oversized collar for added head support

Liquid 4-Liter Refill - Non-Hazmat

WeatherLink for Vantage Pro2™ & Vantage Vue®

with Stainless Steel Shaft Includes Impeller Protection Device that shuts-off pump after 20 seconds of run-dry