Welcome to Defender Canada! 
Double Blocks
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Ronstan Series 40 All Purpose Double Block - RF41200
$77.18 -
Up to 9% offLewmar Synchro Control Double Block - 40 mm (1 9/16")
$98.30 - $102.10 -
Ronstan Series 40 Ball Bearing Double Orbit Block - RF48210
$138.96 -
Ronstan Series 50 Block - 50 mm (2") - RF51200
$109.28 -
Ronstan Series 20 Double Block - 20 mm (3/4") - RF20212
$52.20 -
Ronstan Series 50 Double Block - 50 mm (2") - RF51210
$135.39 -
Ronstan Series 15 Ball Bearing Utility Block - 15 mm (5/8") - RF15202
$36.89 -
Up to 14% offLewmar HTX Double Block - 50 mm (2")
$109.65 - $189.52 -
Ronstan Series 20 Double Block - 20 mm (3/4") - RF20202
$47.20 -
Ronstan Series 30 Orbit Double Block - 30 mm (1 3/16") - RF35212
$60.52 -
Ronstan Series 15 Ball Bearing Utility Block - 15 mm (5/8") - RF15212
$40.78 -
19% offSchaefer 5 Series Double Block - 505-25
$251.00 -
Ronstan Series 30 Utility Double Block - RF417
$33.68 -
Up to 9% offLewmar Synchro Control Double Block - 30 mm (1 1/4")
$61.50 - $64.03 -
Ronstan Series 30 Orbit Double Block - 30 mm (1 3/16") - RF35202
$57.18 -
19% offSchaefer 7 Series Double Block - 704-25
$302.89 -
Ronstan Series 55 Ball Bearing Orbit Double Block - 55 mm (2 5/32") - RF55210
$148.37 -
Ronstan Series 60 Core Double Block - 60 mm (2 3/8") - RF64202
$326.53 -
Ronstan Series 75 Core Double Block - 75 mm (3") - RF74202
$364.28 -
39% offSchaefer 5 Series Double Block - 504-35
$147.79 -
9% offSchaefer 7 Series Double Block - 706-25
$368.59 -
9% offLewmar Synchro Double Block - 90 mm (3 1/2") - 29929002BK
$302.63 -
24% offAntal Looper Double Block with Becket - LS1063
$219.49 -
Ronstan Series 40 Ball Bearing Double Block - RF40200
$103.81 -
Ronstan Series 100 Double Core Block - RF104200
$1,013.38