Product Description YANKEE HILL MACHINE COMPANY Nielsen Piston 9mm 13.5x1mm LH Threads | Stainless YANKEE HILL MACHINE COMPANY Nielsen Piston 9mm 13.5x1mm LH Threads | Stainless at KYGUNCO Browse all KYGUNCO deals $62.68 In Stock at KYGUNCO Price checked 9 days ago Buy Now at KYGUNCO Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Yankee Hill Machine Company Yankee Hill Machine Company