Welcome to Defender Canada! 
Block Accessories
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Harken Stand-Up Spring - 19 mm (3/4") - 097
$2.88 -
Harken Stand-Up Spring - 22 mm (7/8") - 071
$4.04 -
22% offRonstan Link Retainer Clips - RF40001
$5.19 -
Barton Plain Bearing Rope Sheave
$5.22 -
Wichard Polycarbonate Sheave
$5.48 - $18.25 -
Barton Stainless Steel Stand Up Spring
$6.58 - $17.29 -
Ronstan Replacement 55 Series Retainer Clip - RF50001
$7.23 -
23% off
Ronstan Link Retainer Clips - RF40002
$7.51 -
Ronstan Series 40 Standup Spring - RF319
$7.89 -
Barton Tapered Spring for Stand-Up Block - 60119
$8.28 -
Wichard Stand Up Spring
$9.75 - $12.77 -
23% off
Ronstan Replacement 70 Series Retainer Clip - RF70001
$10.10 -
Barton Size 2 Curved Backing Plate for Cheek Block - N02161
$10.83 -
Ronstan Series 25 Ball Bearing Acetal Sheave - RF28000
$12.03 -
Ronstan All Purpose Sheave
$12.23 - $118.40 -
Spinlock WL Furling Line Lead Replacement Sheave - WL-SHEAVE
$12.29 -
Barton Size 3 Curved Backing Plate for Cheek Block - N03161
$13.54 -
Ronstan Series 60 All Purpose Sheave - 2 3/8" (60 mm) - RF437
$14.30 -
Ronstan Series 55 BB Link Retainer Clips - RF50003
$14.80 -
Barton Plastic Stand Up Spring
$15.30 -
Ronstan Curved Surface Cheek Block Adapter - RF41153
$15.87 -
Ronstan Series 55 BB & RT Link Retainer Clips - RF50002
$15.87 -
Barton Stainless Steel Swivel
$17.69 - $24.46 -
Harken AirBlock Sheave - 16 mm (5/8") - 415
$18.86 -
Harken Bullet Sheave
$20.27 - $23.09 -
Spinlock Replacement T50 Sheave
$22.47 - $51.54 -
Wichard Mast Step Adaptor
$22.81 - $30.34 -
Harken Stand-Up Boot
$23.10 - $24.50 -
Lewmar Size 1 HTX Spare Rubber Buffer Kit - 291219911
$23.30 -
Lewmar Control Spring Block Upstand Kit - 30 - 40 mm (1 3/16" - 1 9/16") - 29904046
$23.38 -
Harken Black Magic Stand-Up Base - 57 mm (2 1/4") - MP-3040
$23.61 -
Wichard Swivel Clevis Adapter
$23.86 - $30.60 -
Harken Stainless Steel Double Pin U-Adapter - 5.6 mm (3/16") - 463
$24.50 -
Ronstan Series 75 Acetal Sheave - RZ01000
$24.51 -
Ronstan Series 40 Stand-Up Base - RF2454
$24.57 -
Ronstan Glass Reinforced Nylon Sheave
$24.72 - $42.88 -
Schaefer Delrin Base - 35-019
$26.36 -
Ronstan Series 55 Stand-Up Base - RF2455
$27.43 -
24% offRonstan Stand-up Base - RF2457
$27.73 -
Lewmar Size 0 Delrin Balls (100-Pack) - 29174022
$28.78 -
Lewmar Block Upstand Kit - 29904050
$30.19 -
Barton Ball Bearing Rope Sheave
$30.83 - $35.92 -
Harken Cruising ESP Sheave
$31.55 - $54.11 -
Wichard Ball Bearing Sheave with Captive Balls
$31.55 - $83.14 -
Schaefer Delrin Sheave - 1 7/16" - 62-030-02
$33.01 -
Schaefer Delrin Sheave - 2" - 62-018
$33.01 -
Schaefer Delrin Sheave - 2" - 62-051
$33.01 -
Harken Stainless Steel U-Adaptor
$40.01 - $75.26