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YOUEON 3 Pack Natural Latex Rubber Tubing Tube 1/4" (6mm) ID x 3/8" (9mm) OD, 49.2 Ft Speargun Band for Slingshot Catapult, Surgical Tube, Rubber Tubing, Elastic Parts Rocket Outdoor Hunting: Amazon.com:
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Natural Latex Rubber Tubing 1.6mm ID 3.2mm OD 3.3ft Highly Elastic 782685546430 | eBay
Amazon.com: StonyLab Rubber Tubing, Pure Latex Amber Tubing Natural Rubber Tube 3/8 inch (9 mm) OD 1/4 inch (6 mm) ID Highly Elastic and Strong, 3 Meter : Industrial & Scientific