Union Type Bellows Union-type or twin-sphere bellows from Truco connect misaligned pipelines. Designed with a unique twin-sphere construction, this bellow facilitates greater flexibility in pipelines than regular, single-sphere bellows. Compression moulded and joined by union heads and screw-in threads, Truco's union-type bellows absorb the elongation and contraction of steel pipes caused by variations in temperature and prevents the piping system from cracking. Additionally, our union-type bellows reduce vibration and noise for all types of steel pipes. Features and benefits: Ideal for misaligned steel pipelines Can be used for repairs in existing pipelines Standard sizes available ex-stock Custom sizes available on request Easy installation on all steel pipes Eliminate vibration & noise from pipework Delivery within 1 - 2 days from order Truco warranties its entire range of rubber bellows against inferior quality of material and bad workmanship.