ROK 60056 5" - 4" Reducer Fitting by Samona $4.95 SKU ROK 60056 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart 5" to 4" Reducer Dust Extraction Fitting Join 5"Dust Collector Hose to 4"Dust Collection Hose Rugged ABS Plastic Abrasion Resistant