Passive systems rely on heat-driven convection or heat pipes to circulate water or heating fluid in the system. Passive solar water heating systems cost less and have extremely low or no maintenance, but the efficiency of a passive system is significantly lower than that of an active system.
316L Stainless Steel. 316L Stainless Steel is commonly used for jewelry because with it will not oxidize nor turn black with only minimal maintenance. Its resistance to corrosion and staining, as well as its durability and sleek look have made stainless steel body jewelry the most popular type of material for piercing enthusiasts worldwide. Our body jewelry products are made with high quality 316L Surgical Steel which is safe for all types of body piercings or implants.
Phiten necklaces slowly release a low dose of titanium into your body. This titanium reduces the friction in your muscle to let your muscles move more freely. Not at all. Not even close. Phiten necklaces are made of titanium because this is a metal that conducts electricity well but they DO NOT release a low dose of anything into your body. The idea is that stiff muscles and fatigue may be caused by disruptions in the flow of your body's bioelectric current.