Key benefits Durable aluminum alloy construction with rust resistance provides longlasting, reliable performance in hot, cold, or humid conditions for roof installations. Easy installation with predrilled holes and screw accessories allows quick attachment to rails, including Ushaped and MN types, reducing PV system setup time and effort. Wide compatibility for 30–35 mm solar panels; medium and end clamps securely hold panels on motorhomes, boats, yachts, and street lamps, and work with different roof types without damaging surfaces. Complete mounting set: each package includes 4 or 10 black aluminum clamps with all nuts and washers, offering enough quantity for primary installs and backups. Specifications and materials Material: strength aluminum alloy; finish: black. Suitable for solar panels and rails in the 30–35 mm range; compatible with Ushaped and MN rail profiles. What's included 4 or 10 pieces of black aluminum clamps All nuts and washers included Applications and use scenarios RV and motorhome roof solar installations: attach panels securely to various rail profiles to create a durable, weatherresistant mounting solution. Boat or yacht mounting: mount solar panels on cabin roofs or deck areas with reliable clamp systems that accommodate different roof geometries. Street lamp or outdoor lighting installations: secure solar panels on rooftops or elevated surfaces where varied roof types are present, ensuring stable performance.