FLAT BACK Blow Mold Dock Cushions / Dock Bumpers, DCBM Series
from SailorSams.com

Inexpensive blow-molded dock cushions can easily be mounted to any dock system to provide maximum protection for your boat and dock. Affordable and durable, Blow Mold Dock Cushions from Ace Dock and Accessories are the boater's choice for dependable protection from scuffs, scrapes, and scratches.

Features
• Durable polyethylene to protect your boat from the dock and posts
• Manufactured with ultra-violet inhibitors
• Easy to mount
• Available in white or black
• Provides valuable protection for years
• Hollow - provides some "give" if struck by a boat.
• Grooves in the back of the cushions allow for installation over bolts already installed on docks and dock posts
• Molded-in Counter bores allow recessing of your mounting bolts -  0.45" diameter bolt hole clearance (3/8" diameter bolts work great). 1.12" diameter counter bores allow bolt heads to be recessed below the surface, protecting boats from damage.

TEST RESULTS: Ace Dock Accessories / Den Hartog has done several tests involving their dock cushions, and the evidence shows that their polyethylene dock cushions actually protect your boat better than vinyl.  They have been selling these cushions since 1996.

Many people falsely believe a vinyl dock cushion will better protect their boat than a polyethylene dock cushion, because the vinyl cushion feels soft.  It is actually the opposite.  The vinyl cushions have too much give, and will bend and twist. Your boat has a greater chance of coming in contact with the dock using a vinyl cushion.  It’s the dock that damages the boat - not a dock cushion.  Ace Dock cushions are design to deflect the boat from the dock – not absorb the boat into the dock.