B and K Industries 160-505 1-Inch PVC Expandable Repair Couplings This product is highly durable This product adds a great value This product is manufactured in United states Heavy duty PVC construction meets ASTM-D1784 and ASTM-D2466 Double " O " ring seal constructed of Buna -Inch-Inch These couplings expand and retract allowing easy installations in new or existing pipe lines 1-Inch