Package of (2)each <B>WHITE</B> YKK&reg; SNAD&trade; 3M&reg; adhesive backed, 40mm diameter, White Domed plastic,standard 3/8inch Stud (male) Snaps. Typically used on the boat's fiberglass to attach canvas to (Durable UV-stabilized (they stay white) resin snap, backed with proven 3M&reg; patented VHB&trade; acrylic conformable foam adhesive backing (3M&reg; VHB&trade; adhesive tape has been used successfully for over 25 years by boat and automobile manufacturers to attach trim and emblems. For example, VHB&trade; tape is used to attach Sea Ray's logo emblem to the sides of their hulls). VHB&trade; adhesive is designed to work long term at temperatures from -31&deg;F to 200&deg;F. For more information, see the <A TARGET="_BLANK" HREF="http://www.ykksnap-america.com/ysu_static/tech_notes/SNAD_tech_brochure_2010-12.pdf">YKK&reg; SNAD&trade; Technical Bulletin</A>)