This conduit entry, hub can be used on enclosures that require a watertight seal. This hub is 4 in and is made of chrome plated. Designed for mounting in field cut opening. Includes gasket and four mounting bolts and nuts. This is an B type hub. This device is for R type devices. Dimensions for this product are 35.05 mm (H), 4.44 mm (W), 3.09 mm (D).