15 mm x 10 mm reducing coupler - Conex push-fit fittings join a wide range of tubes including copper, plastic pipe including PE-X and polybutylene (PB), carbon and stainless steel. Manufactured from DZR brass to pr EN 1254-6 standard. Fully demountable and reusable using a release tool and two internal components: high grade EPDM O-ring and stainless steel grab ring.