Check the listing for details. Boron Carbide Insert BCI-517 Bore=7/16" L=1-1/2" O.D=3/4". Color: Black, Condition: New. Listed at 81.58 USD. BCI-517 Wide Spray Boron Carbide insert for Siphon Style Blast Machines Model: BCI-517Part No: 60039Bore: 7/16" (8.00 mm)Length: 1 1/2" (38.1 mm)O.D.: 3/4" Quality replacement boron carbide nozzle for siphon style blast machines. Light duty siphon blasters are used to remove old paint, rust, oxidation, graffiti, most deposits caused by exposure to weather on outside surfaces. Light duty blasters can be used in: Auto workshops, cleaning machinery, glass etching, monument work and restoration. Boron carbide nozzles can last up to 25 times longer or more than a ceramic nozzle when used with expendable abrasives. For free freight, we reserve the right to choose shipping method. Free freight is only offered by standard ground service whether Fedex/UPS/USPO or other carrier Free Shipping available in the Contiguous United States OnlyReturns only accepted with seller issued RGA # Seller does NOT accept returns after 15 days of purchase date.Returned product must be unused, undamaged and in original packing. Track Page Views WithAuctiva's FREE Counter