Sanitary External Hose Crimp Collar -Regular Length Westco Fitting 304 stainless, meets all 3A requirements. Westco fittings are designed to interlock with Westco tri clamp fittings to provide the extra holding strength needed in today's food and brewing operations. Westco also makes a line of BW fittings that are 30% longer then the industry standard. These are for hoses with thick rubber walls that can cold flow after hard use. The extra length gives you the extra hold.