The Barton Windicator is available in 3 models:
Model: Windicator W200L (Barton part# 84002). A wind direction Indicator for the Laser/ILCA lower mast.
Model: Windicator W200OPTI (Barton part# 84002) Optimist Racing Model. Suitable for Optimist sailing dinghies. No holder.
Model: Windicator 200S (Barton part# 84001)Racing Model. Suitable for sailboats 2-4 meters LOA
The Barton Marine Fact sheet on the Windicator range can her download HERE
The following dinghy classes has been tested to confirm the Barton Windicator fits:
W200S
RS Terra
Hartley Streaker
Hartley H10
W200 L
Byte CI - CII
Fusion
RS Aero 6 & 7
Hartley H12
RS100
RS Neo
Seldon D+ Mast section
D-Zero