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.
White gold and sterling silver pieces often contain a metal called nickel which can cause allergic reactions in some people. Stainless jewelry can be (but is not always) made without nickel making it suitable for those allergic to nickel.latinum jewelry is usually 95% pure platinum with other metals added to improve the shine and luster of the final piece. Platinum jewelry is usually marked with a number between 800 and 1000. This number correlates to the percentage of platinum used in the metal with 800 being 80% and 1000 being 100%.