Hydratight's range of subsea clamshells offer the same reliable topside performance upgraded for demanding underwater applications. The series is comprised of 5 standard models covering a range of 4.5 in (114.3mm) up to 36 in (914.4mm) OD. The machines use the same topside accessory assortment as the standard Hydratight clamshells. They are dimensioned off the NB low profile design, making them ideal for operation within tight spaces. The machines come standard with steel shipping/storage crates, keeping them safe and secure even in the most harsh environments.