They are designed to fit a standard drainage hole used by most manufacturers. Colours available are -. White (RAL9016), Black, Dark Brown, Cream (RAL9001), Tan (RAL1011), Silver Grey (RAL7001), Agate Grey (RAL7038), Anthracite Grey (RAL7016), Slate Grey (RAL7015), Bassalt Grey (RAL7012) Mahogany (RAL8017).
eBay