https://www.performance-pcs.com/monsoon-hardline-compression-premium-silicone-lock-collar-seal-for-3-8-x-1-2-fittings-10-pack-black-phor-3812-bk.html15581Monsoon Hardline Compression Premium Silicone Lock Collar Seal for 3/8 x 1/2" Fittings - 10-Pack - Blackhttps://www.performance-pcs.com/media/catalog/product/t/m/tmppicsmon02.jpg1.991.9900USDInStock/Water Cooling/Fittings & Connectors0 0Monsoon00https://www.performance-pcs.com/media/catalog/product/t/m/tmppicsmon02-2.jpg0.9400add-to-cartMonsoonNoO-ring3/8" x 1/2"Matte Black