The Suunto Combo modules are made of Thermoplastic Polyurethane (TPU). TPU is extremely durable and flexible, it does not get easily scratched, and it keeps its form. It is also suitable for sub-zero temperatures. The Suunto Combos have a curved and ergonomic design that fits in the hand comfortably. Combo - Three In Line:

SM-36 Pressure Gauge

The extremely compact Suunto SM-36 tank pressure gauge incorporates a safety-pin-type tube and a gear mechanism, which provide outstanding accuracy and durability. The clear and bright phosphorescent dial face provides excellent readability, also in demanding conditions.  The SM-36 pressure gauge is suitable for 300bar tanks - 350 bar display. 

SM-16 Depth gauge

The Suunto SM-16 depth gauge features a reliable Bourdon tube mechanism with a gear system, a maximum depth indicator, a zero-in facility for high altitude diving and a phosphorescent dial face.  The scale goes up to 70m.

SK-7 Compass

The superior SK-7 has an exceptional tilt potential of +/-30 degrees, which is 2-3 times larger than in conventional diving compasses. The firm-grip bezel with a ratchet at every fifth degree is especially designed to prevent sand and dirt contamination, thus allowing smooth turning in all conditions. It has easy-to-read numerals on a phosphorescent compass card and a large side-reading window.