Adapter Union Socket ISO 228 Female A fast, reliable, and leak-proof solution for compressed air with all materials including a 10-year guarantee. Airnet Union Socket ISO 228 Female D20 £69.33 Ex. VAT Add to basket Adaptor Union Socket ISO 228 Female D25 £110.51 Ex. VAT Add to basket Adaptor Union Socket ISO 228 Female D40 £135.17 Ex. VAT Add to basket