This 4-piece U post base strut mount set is designed to fit 1-5/8 in. square single channel strut systems. Made from high-quality Q235B galvanized steel with a black powder-coated finish, each base offers excellent resistance to rust, corrosion, and water, making it suitable for indoor and outdoor use. The durable construction includes a 5 mm thick steel plate and supports up to 100 kg (220 lbs.), providing a strong and reliable base for strut channel systems. Each base features 2 slotted mounting holes with 12 mm spacing, allowing for flexible adjustment during installation. 2 additional adjustable holes offer secure mounting, even on uneven surfaces or in custom setups. Compact and efficient, each base measures 5.9 in. x 2.3 in. with a strut size of 1.65 in. x 2.35 in. and an overall height of 2.95 in. Despite its heavy-duty design, each piece has a net weight of just 1.43 lbs. Ideal for channel rail, crossmember, or taller strut channel configurations, these mounts provide a sturdy foundation without unnecessary bulk. Note: Bolts are not included.