Generous neck lengths, threaded close to the flange, accommodate a variety of hull thicknesses
Machined sealant groove on the back of the flange to prevent leakage
Made of 85-5-5-5 naval bronze
Very sturdy wall thickness
Machined with straight pipe thread which blends into tapered pipe thread at the end of the neck - mates with virtually any piping or valve without the need for adapter connections