Python Squeeze Stressless Siphon StarterThe Python Squeeze makes it easy to begin a siphon with Python Pro Clean Gravel Washer and Siphon Kits. A simple squeeze of the hand is all it takes to get water flowing, eliminating the need for mouth priming and the risk of swallowing aquarium water. Starts water flow with just a squeeze of the hand Eliminates the need for mouth priming Designed for use with Python Pro Clean Gravel Washer and Siphon Kits Note: Includes both 1 4" and 1 2" adapters.