●CNC aluminium alloy: the distributor adapter is firmly processed by CNC, and the metal material will not crack. Corrosion resistant ●High temperature and cold resistance to ensure no looseness in extreme environments ●Size: carburettor. Distance between two holes 48 mm, screw size: M6 x 14 mm ●Everything fits like a ring: the CNC intake manifold is 33 mm and is suitable for NIBBI PE24/26/28/30, PWK24/26/28 (other carburettors with other 33 mm interfaces). If you use a PE flange carburettor, you do not need to buy this interface ●Make it more durable: embedded end screw to prevent vibration