The Allen Aluminium Sheave Box features a sturdy cast aluminium body and a removable axle pin for easy maintenance and switching between three sheave options. It is designed for use in sailboat masts, deck installations, and other surfaces where rope or wire passage is necessary. Choose from three sheave materials and bearing options to suit your specific application needs. Options include Acetal Plain Bearing for lightweight and low maintenance use up to 400Kg, Stainless Steel Dynamic for maximum performance at 300Kg, and Stainless Steel Plain Bearing for heavy-duty applications up to 400Kg.