The Companion connector is a great accessory for Size Matters hand pumps and pump cylinders. This convenient connector allows you to connect and pump two cylinders at the same time. It works great with our nipple cylinders as well, keeping equal pressure in both cylinders. Enlarge and stimulate your erogenous zones at the same time. Pump connection tube is 9.5 in. long, cylinder connection tubes are 24 in. long.