Usage Tips:Replacement Gas Flame Burner Crown & Cap Kit to fit select models of Gas Oven / Cooker or Hob Fits models: Fits select models of oven, cooker and hob with measurements that match the sizings . Please carefully inspect the images to check base fitting compatibility before purchase. Measurements: Small - Cap diameter: 55mm, Base diameter: 49mm, Central Hole Diameter: 15mm, Medium - Cap diameter: 75mm, Base Diameter: 68.5mm, Central Hole Diameter: 15mm, - Cap diameter: 100mm, Base Diameter: 93mm, Central Hole Diameter: 20mm - all electrode hole diameters are 5mm All Cap Heights: 2mm, All Crown Heights: 18mm (26mm including Stem), All full burner heights including cap and stem: 28mm Complete kit contains 1 small, 2 medium and 1 burner skirt & cap Type:Concave Colour:As Shown Material:Iron cover + aluminum Package Contents: 4 * Accessory part Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.