Feature●Suitable for all standard tank openings (petrol and diesel) and for all vehicles with petrol default fuel protection (not suitable for vehicles with diesel default fuel protection).●Accessories for fuel canisters, double canisters and FuelFriend.●With red union nut and black seal.●Outer diameter approx. 20 mm.●For a = thread outer diameter = 38 mm / (for w = inner diameter of the opening for filling = 29 mm)Descriptionclass="celwidget" data-feature-name="aplus" data-csa-c-type="widget" data-csa-c-content-id="aplus" data-csa-c-slot-id="aplus_feature_div" data-csa-c-asin="" data-csa-c-is-in-initial-active-row="false" data-csa-c-id="n48oil-tqiq1y-9vmog-bhu0ze" data-cel-widget="aplus_feature_div">