FUNCTION: This dust collector attachment features a 4-inch OD end that connects to standard 4-inch ID dust collection hose and allows stepping down to a 3-inch dust collection hose or line branch. EASY TO USE: Offers a 4-inch OD profile with a tapered port on one side, designed to fit inside most 3-inch dust collection hoses. PREMIUM QUALITY: Made from heavy-duty ABS plastic for long-term durability and resistance to abrasion in woodworking and workshop environments. DIMENSIONS: 4-inch nominal OD end; 3-inch nominal OD end. Connects 3-inch ducting to 4-inch flexible hose. Transitions 3-inch ducting to 4-inch standard hose. COLOR: As shown MATERIAL: Plastic PACKAGE CONTENTS: 2 x 4-inch to 3-inch dust collection reducer NOTE: The actual product color may vary slightly due to lighting conditions and screen settings. Measurement tolerance: ±1–3 cm.