Super medium baler-internal mounting flange size: -67 x 135mm 2-11 / 16 x 5-5 / 16 Andersen automatic rings are available worldwide, and are recognized by inflatable boat sailors as the most effective and reliable automatic rings the way. Andersen hooks are made of stainless steel and can provide you with years of trouble-free service. Features: The automatic hook made of stainless steel is an effective and reliable way to ensure trouble-free maintenance for many years.