This 1/2 x 1/4" Smoker gasket features Lavalock technology. "The industries only High Temp Self-stick" Perfectly matched gaskt/adhesive for ultimate high temp performance. 1/2" x 1/4" x 15 feet long, ONE inch wide, by Quarter inch wide, ACTUALL MATERIAL MANUFACTURED PART THICKENESS .220" (shy 1/4") Final processed thickness after adhesive lamination and pressing process varies between 3/16 and 1/4". usally around 7/32" needs to compress 20-50% for maximum seal effectiveness. This 1/2 x 1/4" Smoker gasket features Lavalock technology. "The industries only High Temp Self-stick". Perfectly matched gasket/adhesive for ultimate high temp performance. Product specifications: 1/2" x 1/4" x 15 feet long, HALF inch wide, by Quarter inch wide, ACTUALL MATERIAL MANUFACTURED PART THICKENESS .220" (shy 1/4"), Final processed thickness after adhesive lamination and pressing process varies between 3/16 and 1/4". Usually around 7/32", needs to compress 20-50% for maximum seal effectiveness.