Plastic Ball Elastic Tensioners 3pcs

Three-piece set of black elastic tensioners combining a rigid plastic ball and natural latex cord. Cord lengths offered: 200mm (7.9in) and 150mm (5.9in). Ball diameter approx. 25mm; cord thickness approx. 4mm. Lightweight construction supports easy handling and packing. Plastic component is impact-resistant and stable across UK ambient temperatures (-5°C to +40°C); latex cord remains pliable and responsive without drying or cracking. Operation is based on directional friction: threading the cord through the grommet and positioning it across the ball’s apex creates a fulcrum point. When tension is applied, the cord migrates slightly into the ball’s curvature, increasing resistance proportionally — resulting in stable, self-regulating hold without manual tightening. Widely used across UK contexts: from securing polytunnel side vents and marquee sidewalls to tensioning garage door curtains and temporary exhibition graphics. Compatible with tarpaulin expansion rings, rubber grommets, steel brackets, PVC tarp edges, and woven mesh banners — no adapter or modification required.