TUFNOL 70 mm x 16 mm sheave, with 316 stainless bush / bearing 
Location 1/16-2
Sheave is 70 mm dia' x 16 mm thick, for 10-12 mm rope
Stainless bush 19 mm dia' x 17.5 length with 8 mm bore
 
I have many years experience of selling Marine products and have extensive knowledge for providing spares for winches, windlasses, steering and deck hardware