This is probably the Holt Allen dinghy tiller extension that you need. Holt Allen's Fixed Length Lightning Sticks are stiff and lightweight. Their stiffness comes from their 19mm O/D tube. This larger diameter tube is more comfortable and easier to grip even in cold and harsh conditions. Lightning Stick put you firmly in control and give a responsive feel to the helm.
The HA5519 is used by RS 400 (long) B14, RS600, International 14, Contender and Musto Skiff sailors and is 6' 3 in. (1900m) long and 205.2 grams.