No attempt to connect or disconnect RS Quick Connect ISO B Brass Couplings should be made where pressure exists in the hydraulic circuit. Suitable protective equipment should be worn, such as RS Latex/Neoprene mix Duomix gloves ( ; 475-738 475-738 ), eye protection such as the Bolle Acetate Full Face Visor ( ; 740-1407 740-1407 ) or similar. Quick Connect ISO B Brass Couplings - RS. Quick Connect ISO B Brass Couplings from RS with VITON ;sup>® ;/sup> fluoroelastomer seals, incorporating a poppet valve, mechanically-locking balls, suitable for use within environments from -15 to +180°C. The quick connect ISO B couplings are fully interchangeable with ISO 7241-1 series 'B' products, are designed to prevent connection or disconnection where residual pressure exists, and are very easy to connect or disconnect simply by pulling back on the outer sleeve.