Use these spacers when mounting heat shields. Ceramic spacers are 1" long and 7/16" in diameter. Sold in packages with (30) spacers; (30) 21/2" long #10 screws; as well as (30) plastic anchors. Includes: Screws and Anchors. Features: Type: Heat Shield Spacers. Screws and Anchors. Specifications: Overall Dimensions: 1" ( L) x 0.44" (W).