Winter Variometers are standard fitment in many glider cockpits. The Winter 80mm Variometer is a high-quality mechanical gliding unit rated for 10-0-10kts (5-0-5m/s). Capacity flask (0.45l) with heat sink is included. Weight 270g. A MacCready ring option is available to order and can be supplied with the relevant speeds engraved to customer order. Mounting screws included A MacCready ring option is available to order and can be supplied with the relevant speeds engraved to customer order. Mounting screws included.