Ultralight’s Buoyancy Arms come in various sizes. Large Buoyancy Double Ball Arm segments were designed for the heavy DSLR housings and video housing. They are 2″ in diameter and constructed the same as the regular buoyancy arms.
They range in size from 8″ to 16″ in 2″ increments to be able to add just the amount of buoyancy you need to offset the weight of the housing and strobes or lights.
Amount of buoyancy per arm length:
- 8″ (DB-BL08) 4.5 oz / 128g
- 10″ (DB-BL10) 8 oz / 227g
- 12″ (DB-BL12) 11 oz / 312g
- 14″ (DB-BL14) 14.8 oz / 420g
- 16″ (DB-BL16) 1 pound 2 oz. / 510g
Specifications
Regular Double Ball Arms
| Arm Sizes |
Length | Weight on Land* | Weight in Water* |
| 5 & 5 | 16″ | +13 oz. | +8.5 oz. |
| 5 & 8 | 19″ | +14 oz. | +9.5 oz. |
| 8 & 8 | 22″ | +15 oz. | +10.5 oz. |
| 8 & 12 | 26″ | +15.75 oz. | +11 oz. |
| 12 & 12 | 30″ | +16.5 oz. | +11.5 oz. |
| 12 & 16 | 34″ | +17 oz. | +12 oz. |
| 16 & 16 | 38″ | +18 oz. | +12.25 oz. |
Large 2″ Diameter Buoyancy Arms
|
Part number |
Length |
Weight out of water |
Buoyancy in water |
Length |
Weight out of water |
Buoyancy in water |
| DB-BL08 | 8″ | 6.8 oz. | 4.5 oz. | 203mm | 195g | 128g |
| DB-BL10 | 10″ | 7.7 oz | 8 oz. | 254mm | 218g | 227g |
| DB-BL12 | 12″ | 8.4 oz. | 11 oz | 305mm | 238g | 312g |
| DB-BL14 | 14″ | 9.1 oz. | 14.8 | 356mm | 259g | 420g |
| DB-BL16 | 16″ | 9.8 oz | 18 oz. | 406mm | 280g | 510g |
Use this table, if you are replacing arm segments you already own. Weigh your complete system in water with housing, arms, and strobes to determine its weight in water, then look in the table on the buoyancy column, to decide on which arm length(s) you need for the buoyancy you want.
| Arm section lengths | Length | Weight out of water | Buoyancy in water | Length | Weight out of water | Buoyancy in water |
| 8 & 8 | 22.75″ | 1 lb 7.9 oz | Neutral | 577mm | 676g | Neutral |
| 8 & 10 | 24.75″ | 1 lb 8.7 oz. | 2 oz. | 628mm | 698g | 50g |
| 10 & 10 | 26.75″ | 1 lb 9.5 oz. | 7 oz. | 680mm | 723g | 198g |
| 10 & 12 | 28.75″ | 1 lb 10.2 oz. | 8.3 oz | 731mm | 742g | 235g |
| 12 & 12 | 30.75″ | 1 lb 11 oz | 11.2 oz | 780mm | 762g | 318g |
| 12 & 14 | 32.75″ | 1 lb 11.7 oz. | 15 oz. | 832mm | 783g | 425g |
| 14 & 14 | 34.75″ | 1 lb 12.4 oz. | 1 lb 3 oz. | 884mm | 804g | 539g |
| 14 & 16 | 36.75″ | 1 lb 13.3 oz. | 1 lb 6 oz. | 935mm | 827g | 624g |
| 16 & 16 | 38.75″ | 1 lb 13.9 oz | 1 lb 9 oz. | 980mm | 846g | 709g |
Use this table if you are replacing your complete arms or do not have any arms for your system. Weigh in the water your housing and strobes and any other equipment you plan to use, then look in the table, buoyancy column, to decide on which arm set you want for the buoyancy you want.
| Size | 8" (20cm), 10" (25cm), 12" (30cm), 14" (35cm), 16" (40cm) |
|---|
Quick Shipping and Professional Packaging
Our long-standing relationship with UPS FedEx DHL and other international carriers gives us the ability to provide a range of shipping services. Our warehouse staff are expertly trained and will wrap your items according to our precise and exact specifications. Your goods are thoroughly checked and secured properly prior to shipping. We ship to thousands clients every day in a variety of countries. This shows our commitment to becoming the largest online retailer on earth. The distribution centers and warehouses distribution are located in Europe, as well as the USA.
Note: Orders that contain more than one item are assigned a particular processing time based on the individual product.
Prior to shipment, all purchased items will be thoroughly inspected. The majority of orders are shipped within 48 hours. The delivery estimate is 3 to 7 days.
Returns
The inventory is constantly changing and we are unable to fully manage it due to the fact that several parties are involved, including our warehouse and factory. Stocks can be changed at any moment. Be aware that it's possible that your order could become unavailable even after you've placed your order.
Our policy runs for 30 days. We will not return or exchange your purchase if it has been 30 days since you purchased it.
The item cannot be in use and must be in the original packaging. The item must be in the original packaging.
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