Use the NRS Universal Foam Canoe Blocks (set of 4) to protect your canoe and the top of your vehicle during transport.

Features:

• Durable minicell foam cushions your boat and protects your vehicle.
• The slot in the foam blocks can pop onto the canoe gunwales (two per side). Then the flat non-skid surface is placed directly on the vehicle roof.
• Please note: Tie-down straps are necessary to safely carry a boat on your car.
• Molded channels for roof rack bars or canoe gunwales
• Non-skid surface on block underside
• Set of 4 blocks

Specifications:

• Weight: 9 oz
• Dimensions: 4"W x 4"D x 7"L
• Molded channel is 1 1/2" in diameter