Filling aid for DIN 50 screw caps

Filling aids for jerrycans with DIN 45 or DIN 50 screw caps, black/light blue.suitable for fuelling small engines on motor saws, lawn mowers, etc. integrated ventilation for liquid transfer without gurgling closes automatically and thus prevents spillage of contents before and after fuelling reduces the leakage of petrol vapour and protects the environment from contamination with union nut for exact positioning with small tank openings Adapter on cap, black for industrial jerrycans with DIN 45 screw caps