Blueline Ultimate Sewer Kit contains everything you need for the most simple, secure hookup up to 20 feet! Nine-piece kit contains: one Universal Elbow, one Hose Adapter, two Ultimate Sewer Hoses (10 ft.), one Hose Coupler and four Sewer Seals. Universal Elbow securely fits most park sewer openings. Hose Adapter has four bayonet hooks and an "X-ring" seal for a leak-free connection to most waste-valve outlets. Ultimate Sewer Hoses have Pushover Quick Connectors installed for simple, push-on connections without the need for clamps. Hose Coupler easily extends hoses up to 20 feet. Sewer Seals create a secure, air-tight seal with hoses and fittings, eliminating unwanted odor and drainage.