The number of spacers per 50 gram pack varies by size and shape. You can find an approximate number of the spacers included in a pack under the product description on that item's page. For instance: 50G-INDSY40 contains approximately 500 spacers per 50 gram pack. This is noted in the product description on this page: http://www.artbeads.com/50g-indsy40.html

The PGM-BF001 fits a 7mm round bead. An 8mm is too tight.

The PGM-BF002 fits a 7mm round bead the best.

The PGM-BF003 fits an 8mm perfectly.

Our base metal earrings are hypoallergenic and nickel free so most people with sensitivities should be able to wear them safely.

Thank you for your inquiry Sarah! The ear-wires that you are referring to are a silver plated base metal. The gauge will depend on the specific ear-wire you are referring to. Please contact our Customer Service Department for further information regarding these items. You can email us at support@artbeads.com. We look forward to hearing from you soon!

You can use it as a link or a focal component. Below you will find two free designs from our Learning Center that demonstrates these uses:

http://www.artbeads.com/winter-dusk-necklace.html

http://www.artbeads.com/anthology-necklace.html

We have two different free design ideas for eyeglass holders in our Learning Center:

http://www.artbeads.com/siandpeeyho.html

http://www.artbeads.com/mommy-and-me-sunglass-holders.html

Bead frames make great pendants, earrings, and links in bracelets. Just string your favorite bead in the center of the frame for a fun look. Check out this free earring design from our Learning Center that shows one use of the bead frame:

http://www.artbeads.com/alyssas-bridesmaid-earrings.html

The Silver-Plated Jump Ring 6mm (Product Code: JR-S06) measures approximately 19 gauge.

That's almost half an inch. (0.45 in. to be precise)

According to the ever-so-accurate Wikipedia, "In alchemy, a base metal was a common and inexpensive metal, as opposed to precious metals, mainly gold and silver."
In terms of chemical makeup, "In chemistry, the term base metal is used informally to refer to a metal that oxidizes or corrodes relatively easily, and reacts variably with diluted hydrochloric acid (HCl) to form hydrogen. Examples include iron, nickel, lead and zinc. Copper is considered a base metal as it oxidizes relatively easily, although it does not react with HCl. It is commonly used in opposition to noble metal."

In other words, base metal is a substitute for gold, silver, brass. It is not necessarily hypo-allergenic and can irreversibly tarnish.