This Magnetic Clasp is an amazing connector and comes in many different styles. It is perfect for your bracelets and necklaces. The clasp is made of plated material, available in gold, silver, white K, or rhodium. The dimensions of the clasp vary and the hole size is approximately 1.5-2MM. It is also modified to fit your needs. Get creative with your jewelry-making with this Magnetic Clasp. ***NOTE*** There are 2 shipping options to choose with different costs.*** 1. $1.49 Standard Shipping with no tracking. They are shipped in a plain white envelope to save the extra postage cost below. The $1.49 covers the mailing cost. 2. USPS First Class Package Rate. $4.80 postage cost which covers the USPS cost and provides a tracking number. It will be sent in an Air Jacket padded mailer for protection As of January 2023 the post office raised it?s rates once again, retail, to get a tracking number which you can only get by sending via option 2, First class package. If you require tracking you MUST choose ?USPS First Class Package? and switch it from $1.49 standard shipping to "USPS First Class Package" rate DURING CHECKOUT!