The RK3 HD is available in four sizes: Small

perfect for the exploration diver with a large amount of equipment

An evolution of the most advanced regulator technology

Everything a diver needs for a sidemount breathing system is found in this set

this popular regulator ensures optimal hose routing while eliminating sharp bends

mtx r sidemount set dive regulator AccessoriesSafety The RK3 HD is availableThe MTX R sidemount set is a super tough, rugged, high performance, go anywhere sidemount regulator configuration designed to meet the rigours of cold water and extreme sidemount diving. The MTX R is highly reliable and also very easy to service out in the field which make it an ideal choice for the expedition and exploration diver.