Swimming Pool Shade Manufacturer in Karnal, Swimming Pool Shade Suppliers in Karnal, Swimming Pool Shade in Karnal. DTH is one of the leading manufacturing & supplying of pool shade covers in Karnal & they are ideal for those who looking to block the sun's harmful rays without sacrificing the integrity of their swimming pool or outdoor space. These products are also built to endure a lifetime of harsh weather as they protect against high wind, heavy rain, heat waves, and hail. Unlike other metals, this material is not susceptible to rot, rust, corrosion, or fading.