GM 50mm FI x 50mm FBSP Adaptor (Single Lug Type)
https://www.esafeworld.com/shop/gm-50mm-fi-x-50mm-fbsp-adaptor-single-lug-type-11098
https://www.esafeworld.com/web/image/product.template/11098/image_1920?unique=f7ddf5d
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Copper Alloy 50mm Female Instantaneous x 50mm Female BSP Adaptor
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