NL-19 - Blk-29 FOREVERBOLT 300 Series Stainless Steel, Worm Gear Hose Clamp treated with NL-19 Our Clamps are surface treated with NL-19. NL-19 will greatly reduce corrosion and make the stainless steel brighter and chrome looking. NL-19 is not a coating or plating and will not peel off like other processes. Then we add BLK-29 to the hose clamp with our proven process. Each BLK-29 Hose clamp will look like black chrome. NL-19 is our trade secret proprietary metal treatment that we have now truly perfected Treated with NL-19 Treated with BLK-29 (SM) Worm-drive banded hose clamp.
