Dart Arrow Set Karella K-4 Softdarts, 16 g. High-quality, partially faceted and colored shafts, as well as matching flys in top design, make the K models very popular, especially with recreational players. The Karella darts are delivered in a handy Karella blister box with a gray velvet insert. Dart Arrow Set Karella K-4 Softdarts. Weight: 16 g. Thread: small thread 2BA = 6 mm. Actual appearance may differ slightly from the illustration.