The lifebuoy from SeaTec has an outer diameter of 58 cm and an inner diameter of 34 cm

With this heat exchanger

Package dimensions: Dimensions: 6 cm × 6 cm × 5 cm | Gross weight: 0

Package dimensions: Dimensions: 6 cm × 6 cm × 8 cm | Gross weight: 0

Package dimensions: Size: 8 cm × 8 cm × 26 cm | Gross weight: 1

Bowman, Endestykke-dc.3367/32mm Gummi BL130225 The lifebuoy from SeaTec hasRubber end cap for DC oil coolers. This product ensures a tight and durable connection, which is essential for the efficient operation of your equipment. Brand: Bowman Weight: 0. 58 kg Inner : 50 mm Material: Rubber Hose connection: 32 mm Package dimensions: Dimensions: 6 cm 6 cm 5 cm Gross weight: 0. 58 kg Rubber end cap for DC oil coolers