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SNAP-X-TENDZ™ canvas snap extenders securely fix shrunken marine canvas on boats, pontoons, RVs, and pop-up campers. Made from UV-rated, saltwater-tested elastic polymers and marine-grade stainless steel snaps, each extender stretches up to 1.75 inches, providing self-adjusting tension for a tight, reliable fit. These U.S. patented snap extenders offer a quick, cost-effective alternative to canvas repairs. Available in Tan or Black, each package includes 4 pieces, and you can connect two for double the length.