Where do you get them? Home Depot? Lowe's?
These are 1 7/8 ID 1/4 inch diameter silicone. As you can see I bought 35, the minimum for what one costs in an ABS.
http://www.theoringstore.com/
http://www.parcoinc.com/
*O-ring Warehouse is a division of Parco, Inc. Billing and shipping information will reflect Parco, Inc.***
Order placed on November 12, 2012 at 7:03 AM
Shipping Information
USPS Priority Mail
Billing Information
Size Material No. of Pieces Price Each Subtotal
-328 70-durometer Silicone, Red, FDA
Compound: 1200-70 35 $0.29 $10.15
Subtotal $10.15
Shipping $5.30
Order Total $15.45