The Schmitt & Ongaro Marine 1-7/8" Throttle Knob with Gold Grooves is a component designed for marine throttle control systems. Constructed from 316 cast stainless steel, this knob is intended for use in demanding industrial and marine environments. It is specifically engineered to fit Hynautic D-Dec and Sturdy Controls throttle systems. The design incorporates gold grooves for tactile identification and visual differentiation, adhering to ABYC specifications for marine hardware.