Bloc skylight blinds are compatible with all the main brands including Velux, Roto, Fakro and Rooflite. Manufactured in the UK, they are available in a wide range of colours to suit your style. They're simple to fit using your existing skylight blind mechanism and are completely blackout when fitted, thanks to the protective case on the back of the top cassette unit. This stops the light from leaking in at the top of the blind and has the added benefit of preventing fading, as well as damaging or marking of the fabric during installation. You can order up to 5 fabric samples by emailing johnlewis@blocblinds.com. Samples will arrive within 3 days. Window size code C02 - W37.3cm x Drop 53cm Window size code C04 - W37.3cm x Drop 73cm Window size code M04 - W60.3cm x Drop 730cm Window size code M06 - W60.3cm x Drop 93cm Window size code M08 - W60.3cm x Drop 115cm Window size code P10 - W76.3cm x Drop 135cm Window size code S06 - W96.3cm x Drop 93cm Window size code U04 - W116.3cm x Drop 73cm Window size code CK02 - W37.3cm x Drop 58.2cm Window size code CK04 - W37.3cm x Drop 78.2cm Window size code MK04 - W60.3cm x Drop 78.2cm Window size code MK06 - W60.3cm x Drop 98.2cm Window size code MK08 - W60.3cm x Drop 120.2cm Window size code PK10 - W76.3cm x Drop 140.2cm Window size code SK06 - W96.3cm x Drop 98.2cm Window size code UK04 - W116.3cm x Drop 78.2cm