Propeller Shaft Key R&D Flexible Couplings The Maestrini bronze ball valve

The Maestrini bronze ball valve features drain plugs to simplify winterisation and a nickel-plated brass handle that can be re-positioned to reverse the direction of movement allowing for easier installation in certain applications

The natural resilience of rubber gives the bearing its shock

Brass is susceptible to dezincification and may not last as long as other materials in below waterline through hull applications

The mount is soft vertically and at right angles to the crankshaft to isolate vibrations

gums and varnishes

Propeller Shaft Key R&D Flexible Couplings The Maestrini bronze ball valveKey for Propeller Shaft. Square section. Rounded one end. Available in Imperial and Metric Sizes.