Rubber elbow, 45 degrees. As fitted to most Pre Unit models, originally fitted with a 376 Amal Monobloc carburettor and Vokes 'D' shaped air filter, but also universally useable!
Diameter long piece: inside ±32mm / outside ±37mm
Diameter short piece: inside ±38,5mm / outside ± 43mm
ID : 1-1/2" x 1-1/4"