The Axminster Workshop Modular 4-Step Fitting is a versatile 4-section hose reducer designed for connecting dust extraction or vacuum hoses of varying diameters. Its sections nest together, allowing for flexible use of all four, three, a pair, or individual sections. Each section features a slight taper to accommodate differences in internal hose diameter, with the largest section measuring 98mm OD for a snug fit in 100mm extractor hose. This fitting offers an economical and practical way to join different size vacuum hoses for added length. Section 1: 35mm OD to 35mm OD x 43mm long. Section 2: 40mm OD to 40mm OD x 50mm long. Section 3: 45mm OD to 62mm OD x 59mm long. Section 4: 68mm OD to 98mm OD x 67mm long. Please note all sizes are approximate. Weight: 0.2866009406 Pounds. Manufacturer: Axminster Workshop.