This clay 450mm plain angle ridge from Marley comes in Red Smooth and has a 135° angle. The plain angle ridge tile can be used with clay plain tiles but should not be used on rafter pitches below 35° with Acme double camber or Ashdowne handcrafter clay plain tiles. Marley's 450mm plain angle ridge tiles are compatible with the Marley RidgeFast ventilated dry ridge system, except for the 75° angle. 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: Red Smooth Angle: 135° Length: 450mm Height: 140mm