Typically, sidemount divers use cylinders with a matched pair of left and right hand DIN valves together with a pair of DIN regulators also configured for the left and right side (yoke style fittings are ill-advised sidemount applications.) The cylinders are then attached to the sidemount diver using their preference for bungee strap styles. If you prefer to cradle your valve with a traditional style bungee strap you may prefer our Modular L/R valves that offers the additional post extending out of each side. We also offer Modular Long Neck L/R valves that have a little bit more space just above the base so that you can take a wrap with your bungee. We feel the ring style bungees are best mated with our Pro L/R valves as they do not require your bungee to wrap around or loop onto the valve. Having valves and regulators with specific orientations means you must pay close attention to left and right whenever the straps and regulators are rigged to the cylinders.