Manufactured by Schego in Germany from high-quality components making them shatterproof, saltwater proof and virtually indestructible, these heaters are built to last.The main heating element is surrounded by the completely non-corrosive titanium jacket which is also one of the best materials for transferring heat. This makes them not only incredibly long lasing but also highly economical. Specifications:Suction Cap material: NeopreneCable length: 1.5 mElectrical connection: UK Plug 230 V 50 Hz NOTE: D-D Titanium Heaters do NOT have a thermostat and therefore require a suitable temperature controller such as the D-D Dual Temp Controller to regulate temperature. D-D’s Titanium Heaters are available in three sizes:200W 250 mm x 25 mm (L x W) For aquariums up to 250 litres 300W 250 mm x 25 mm (L x W) For aquariums up to 300 litres600W 350 mm x 25 mm (L x W) For aquariums up to 650 litres (This Model)