Excellent Material: Made of high-temperature resistant plastic material, corrosion proof, no odor, 75mm duct vent outlet has good durability. Size: Mounting port Inner diameter 71mm/2.79", outer diameter 75mm/3". Air outlet diameter: 99mm/3.9", height: 75mm/3". Please confirm it is right for you before purchase. 360 Degree Rotatable: Air vent outlet is adjustable, It rotates through 360 degrees enabling the warm air to be directed to the required area. Applicability: Warm air vent outlet fits for diameter 75mm warm air ducting. Compatible with Eberspacher Webasto diesel heaters. Package Includes: 1 x 75mm/3inch air duct vent outlet.