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Stainless Sheaves with Bronze Bushings
SUN-1010- $20.99 
SUN-0050- $15.48 
SUN-0810- $16.84 
SUN-0032- $9.98 
SUN-0025- $7.32 
SUN-1010 SUN-0050 SUN-0810 SUN-0032 SUN-0025

If you have read some of the articles in Duckworks about making your own Blocks, and want to try it, but are uncertain about making the sheaves, this may be what you need. These 304 stainless steel sheaves with bronze bushings are also useful for any application where you need a rope to go around a corner with very little friction. A masthead halyard pulley would be one example. A cheek block would be another.

 
Part #
ID
OD
Rope size
SUN-1010
3/8"
2-1/4"
up to 3/8"
SUN-0050
3/8"
2"
up to 1/2"
SUN-0810
3/8"
1-3/4"
up to 5/16"
SUN-0032
5/16"
1-1/4"
up to 5/16"
SUN-0025
1/4"
1"
up to 5/16"

Part # A B C D E
SUN-1010 3/8" 2.25" 3/8" 0.56" 0.82"
SUN-0050 1/2" 2" 3/8" 0.78" 0.81"
SUN-0810 5/16" 1.75" 3/8" 0.44" 0.65"
SUN-0032 5/16" 1.25" 5/16" 0.61" 0.61"
SUN-0025 5/16" 1" 1/4" 0.59" 0.59"