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Dive Rite Heavy-Duty Double Tank Bands are available in a 2.5-inch width for 7.25-inch tanks and a 3- inch width for 8-inch tanks and both sizes offer standard 8.5-inch center to center manifold spacing, so no special manifold is required. All Dive Rite bands are tungsten inert gas (TIG) welded, passivated, and have deburred edges that minimizes scratching tanks during assembly. Dive Rite heavy-duty bands are constructed of 18-gauge, 304 stainless steel, with a #3 polished finish and 11-gauge, 304 stainless steel structural plates. Every Dive Rite ultra high quality band is precision sheared and punched and goes through a stringent quality control test during each step of the manufacturing process.

Dive Rite's bands kits include the appropriate size stainless steel all-thread bolt kit. Dive Rite bolts, nuts and washers are also all made of 304 stainless steel, a high grade, low carbon metal that strongly resists corrosion, even in saltwater.

Dive Rite also offers a special doubles band set for 5.5-inch tanks (US LP45's, AL40's and Euro 7L). However this set uses 7.75-inch center-to-center manifold spacing, so a manifold with a special short length (165 mm) isolation crossbar is required.

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to read how to assemble doubles.

Choose the appropriate size set of tank bands for your cylinder size. Dive Rite's Heavy-Duty GM1037 bands fit the larger 8.0-inch diameter cylinders such as aluminum 100's or steel LP104's and HP130's. Dive Rite's Heavy-Duty GM1033 bands fit cylinders with diameters between 6.9 and 7.5-inches such as 7.25-inch aluminum 80s or steel HP100's. Dive Rite's Heavy-Duty GM1035 bands fit cylinders with diameters of approximately 5.5-inches such as steel LP45's and aluminum 40s.

An often heard debate is the merits of threaded bolt versus all-thread bolt. Corrosion is not an issue because both types are made from high grade stainless steel. Strength is not an issue either, because a 5/16 threaded bolt and a 5/16 all-thread bolt are nearly equal in tensile strength. (The core diameter of both a threaded bolt and an all-thread bolt is where the bolts derive their over 70,000 psi of strength.) As for all-thread bolts being cheaper; they are slightly less expensive but not lower quality. Dive Rite uses all-thread bolts not due to price, but in order to provide customers with the option to adjust their bolt height. Depending on the backplate brand and model, it is possible to have too many threads protruding causing the bolts to puncture a dry suit or wetsuit. The all-thread bolts allow you to precisely adjust the bolt height to perfectly fit any brand or size of backplate and wing assembly.

In the late 1980s, more dual outlet manifolds became available with several choices for seal design and centers spacing. Specialty band manufacturers also entered the market and offered a variety of band sizes and types for use with different manifolds and tanks. Some manufacturers used tack welds that would allow the bands to flex in accordance with the size of the tank, rather than manufacture multiple sets of bands. The tack weld approach required care during assembly because the welds would separate if the assembler were to over-torque the bolts.

By the 1990s, valve manufacturers began to standardize manifold centers spacing and isolation valve crossbars became the norm. The double barrel seal manifold became the preferred design, providing better shock absorption and redundancy over the metal-to-metal seal manifolds. Band sizes standardized at 7.25-inches and 8-inches and tack welded bands became obsolete, the tack welds replaced by rigid structural plates.

Today, the new generation 8.5-inch center-to-center spacing manifolds provide up to 0.25-inches of adjustability so that tank bands fit properly even when there are minor variations in tank dimensions. If you have a manifold with double o-ring seals manufactured within the last five years, you should not need a specialized tank band. If you have a manifold without double o-ring seals OR a manifold manufactured more than five years ago, you will need to consult the specific manifold manufacturer for a recommendation on proper tank bands.