Spring and spacer units Fit and spacer units 244.16./18. Spring and spacer unit 244.17. Shoulder screws Clamping pad cushioning Spring unit Spring and spacer unitFIBRO, we focus on the needs of our customers and offer solutions that are tailored to you. Whether it's standardized products, customizations, or customized solutions, our dedicated team works in partnership with you to create the best possible value for your business.