The tri-colour version (30429/49) features all-round white and starboard & port lights, while the four-colour version (30439/59) features all-round white, stern and bi-colour light. Both sets are made of UV stabilized ABS plastic, with shatter-proof acrylic lens, non-magnetic stainless steel electrical contacts and a nitrile water-resistant seal to provide reliable long life. Both combinations are available in black and white and can be easily installed.