This document contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements, which a single mode fusion splice protector need to meet in order for it to be categorized as an EN standard product.

Although, in this document, the product is qualified for EN IEC 60793‑2‑50 type B-652.D single mode fibres it is also suitable for fusion splice protection of multimode fibre with 125 µm diameter glass cladding and other single mode fibres with 125 µm diameter glass cladding.