Double Premium Cube

Double Premium Cubes
Extra Stability – Aussie-Grade Strength
 
Our Double Premium Cubes take stability to the next level thanks to their unique male/female curved locking system – delivering better strength, balance and buoyancy than standard double cubes.
 
Built tough with extra interlocking curves on two sides, these cubes offer a higher payload capacity of 350kg per m², making them ideal for drive-on/off docks and heavy foot traffic zones. The curved design also gives your dock a sleek, modern look when set up on the water.
 
Because of their extra strength and smart design, these cubes are a top pick for floating walkways, berths, pontoons, jetties, and any platform where people are coming and going regularly.
 
Available in Blue, Grey, or Orange, or choose a custom colour to suit your brand or style (minimum order of 240 cubes for custom colours). Whatever setup you’re after, these modular cubes can be easily expanded, reconfigured, relocated or dismantled to suit changing needs.
 
Maintenance-free and made from eco-friendly materials, the Double Curved Cube system is a long-term investment built to handle Aussie conditions with ease.
 
Designed for heavy-duty floating solutions.
 
Double Premium Cube Specs
Size: 100 x 50 x 40 cm
Weight: 10kgs
Colour: Blue, Grey, Orange
Custom Colour: MOQ 120m2 (240pce)
Durability: Resistant to UV, frost, seawater, corrosion, and heavy impact
Safety: Anti-slip surface with rounded edges for safe, stable walkways
Flexibility: Modular design allows quick installation and easy reconfiguration
Longevity: Designed for 10–15 years of dependable use with minimal maintenance
Material: 100% high molecular weight & high-density HDPE
Pontoon buoyancy: > 360 kg/m2 - Detection method: QB 1557-1992
Diagonal tensile strength: > 27 kN - Detection method: GB/T 1040.1-2006
Compressive strength: > 40 Kn - Detection method: GB/T 8813-2008
Tensile strength: > 30 Mpa - Detection method: ASTM D638-2014
Impact strength: > 65kJ/m2 - Detection method: ASTM D256-2010
 
ROHS tests
The raw materials do not contain six chemicals including lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl and polybrominated diphenyl ether, making it more conducive to human health and environmental protection.
 
Pricing ex Depots (Cubes Only)
Double Premium Cubes included with purchases of dock systems sold per m2
To Purchase separately: $275ea (includes shipping)
OTTOP depots in Brisbane, Melbourne, Perth, and Sydney
To Door Delivery and Other Destinations available on request
 
Delivery Time
Approximate lead time is 6–8 weeks
 
Dock Accessories
OTTOP carries the largest range of modular dock accessories in Australia
Discounts available when purchased with a dock system
Accessories also sold separately (shipping applies)
 
Dock Installation
DIY ready with straightforward setup
Two people can install around 50 cubes per hour
Comes with clear, step-by-step instructions
Installation available on request (service fee applies)