What is the difference between an externally threaded barbell made of surgical steel, and one made of regular steel?

The difference between an externally threaded barbell made of surgical steel is detailed below. Surgical Steel Externally Threaded Barbell 14G - Length: 5/8 - Sold as a Pair by WickedBodyJewelz - Barbells Be the first to review this item | Like (0) Price: $2.52 Special Offers Available In stock. Processing takes an additional 4 to 5 days for orders from this seller. Ships from and sold by Toltec Trading Company. Product Details Shipping Information: View shipping rates and policies ASIN: B001P6XH94 1. http://Amazon.com Gift Cards are issued and © by ACI Gift Cards, Inc., a Washington Company. See http://www.amazon.com/gc-legal for complete terms and conditions. 2. Note: To immediately use your card to place an order to an address that is not currently on your http://Amazon.com account, please add the address to your http://Amazon.com account before applying for the http://Amazon.com Store Card. To add an address, visit the Address Book. 3. No Annual Fee: As of August 1, 2011 variable Standard purchase APR is 25.99%. Minimum interest charge is $1.50. 4. 6-Month Financing Offer: No interest if paid in full within 6 months. Interest will be charged to your account from the purchase date if the promotional balance is not paid in full within 6 months. Minimum monthly payments required. Offer is subject to credit approval. Applies to any order total of $149 or more made between 12/31/11 and 01/31/12 on an http://Amazon.com Store Card account. 1-Click and phone orders do not apply to this promotion. Items sold on http://Amazon.com by third party sellers qualify for this offer. No interest will be assessed on the promotional purchase if you pay the following (the "promotional balance") in full within 6 months: (1) the promotional purchase amount, and (2) any optional debt cancellation charges related to the promotional purchase. If you do not, interest will be assessed on the promotional balance from the date of the purchase. Regular account terms apply to non-promotional purchases and, after this promotion ends, to your promotional purchases. For new accounts: Standard variable purchase APR is 25.99%. Minimum interest charge is $1.50. The APR is accurate as of August 1, 2011 and will vary with the market based on the Prime Rate (as defined in your credit card agreement). Existing cardholders should see their credit card agreement for their applicable terms. 5. 12-Month Financing Offer: No interest if paid in full within 12 months. Interest will be charged to your account from the purchase date if the promotional balance is not paid in full within 12 months. Minimum monthly payments required. Offer is subject to credit approval. Applies to any order total that includes an advertised eligible product sold by http://Amazon.com made between 12/31/11 and 01/31/12 on an http://Amazon.com Store Card account ("Qualifying Purchase"). 1-Click and phone orders do not apply to this promotion. Any purchase of products sold on http://Amazon.com by third-party sellers do not count as a Qualifying Purchase but may receive the benefit of this offer if on the same order as a Qualifying Purchase. No interest will be assessed on the promotional purchase if you pay the following (the "promotional balance") in full within the required promotional period: (1) the promotional purchase amount, and (2) any optional debt cancellation charges related to the promotional purchase. If you do not, interest will be assessed on the promotional balance from the date of the purchase. Regular account terms apply to non-promotional purchases and, after this promotion ends, to your promotional purchases. For new accounts: Standard variable purchase APR is 25.99%. Minimum interest charge is $1.50. The APR is accurate as of August 1, 2011 and will vary with the market based on the Prime Rate (as defined in your credit card agreement). Existing cardholders should see their credit card agreement for their applicable terms. Source: http://www.amazon.com/Surgical-Steel-Externally-Threaded-Barbell/dp/B001P6XH94