Line 1: Magnetic HM High Strength Leak Patch 18x18 Description: Four (4) 18in x18in high strength magnetic, flexible patch. Urethane material to ensure longest possible chemical penetration resilience - minimum test capability of 8-hours for all ASTM A903 standard (exempt. Nitric Acid, 70%). Minimum 30 pound pressure. Corner rings for attaching hold straps. Carry case for each patch capable of reducing patch's strength when stored in equipment truck or around sensitive equipment. Line 2: Magnetic HM High Strength Leak Patch 12x12 Description: Four (4) 12in x 12in high strength magnetic, flexible patch. Urethane material to ensure longest possible chemical penetration resilience - minimum test capability of 8-hours for all ASTM A903 standard (exempt. Nitric Acid, 70%). Minimum 30 pound pressure. Corner rings for attaching hold straps. Carry case for each patch capable of reducing patch's strength when stored in equipment truck or around sensitive equipment. Line 3: Teflon Sheets for use with Leak Patch 18x18 Description: Four (4) Teflon sheets 18in x 18in for use with Line 1 Magnetic leak patch kit. Teflon sheet provides barrier to reduce/prevent patch from degrading under certain chemical exposure. Teflon may be primary patch composition barrier to be held in place by the magnet patch. Items designed to work in tandem. Line 4: Teflon Sheets for use with Leak Patch 12x12 Description: Four (4) Teflon sheets 12in x 12in for use with Line 2 Magnetic leak patch kit. Teflon sheet provides barrier to reduce/prevent patch from degrading under certain chemical exposure. Teflon may be primary patch composition barrier to be held in place by the magnet patch. Items designed to work in tandem.