51x55 swivel necklace for 45x52 pipe

Clamping necklace for Corfu XXX hose. Correspondence of connection dimensions in mm and inch: - diameter 33 mm (inside) / 42 mm (outside) = 1 ¼ inch - diameter 40 mm (inside) / 49 mm (outside) = 1 ½ inch - diameter 50 mm (inside) / 60 mm (outside) = 2 inches