Equipped with a hyperdry elite top standard, the best model for snorkels; Hyperdry Elite top to prevent water from entering pipes; Flexible joint to minimize water resistance. Durable and stable use; [Small mouthpieces] Drain valve that allows water to be easily discharged in pipes; Specifications: Volume: 4.6 fl oz (134 cc); External dimensions: 15 x 105 mm); Weight: 5.3 oz (150 oz (150 g).