This clay 450mm capped angle ridge from Marley comes in Slate Black has an angle of 90°. The capped angle ridge can be used with clay plain tiles but should not be used on rafter pitches below 35° with Acme double camber or Ashdowne handcrafted clay plain tiles. Why Clay Fittings All clay fittings can be used with clay plain tiles, keeping that authentic roof look. Clay plain tile ridge tiles are a key example that can be attached to clay fittings because of their security ridge straps. In turn, this means little need for long searches for a fitting that can match expectations. Clay roof fittings can also be decorative or plain depending on the purpose of your property. Product Specification Colour: Slate Black Angle: 90° Length: 450mm Height: 185mm Minimum Pitch: 35°