304 stainless steel good.
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630 stainless steel is a precipitated, hardened, martensitic stainless steel composed of copper, niobium\/columbium.
This grade features high strength, hardness (up to 300o C\/572o F) and corrosion resistance.
304 stainless steel with its good heat resistance, and is widely used in the production of corrosion resistance and formability of equipment and parts. At present, 304 stainless steel has been widely used in food, chemical, atomic energy and other industrial equipment and decoration fields as well as household goods, cabinets, indoor pipelines, water heaters, boilers, bathtubs, auto parts, medical equipment, building materials, chemical, food industry, agriculture, ship parts.
The g603 and 304 are both good, and have the longest standby time of any Logitech wireless mouse, can be used continuously for hundreds of hours, and can be used continuously for months at low returns, and the battery is very easy to change. The price is relatively cheap. Support Bluetooth wireless dual mode. Same ergonomic design as G703, G403.