For internal pipe sizes of: 60mm, 80mm, 100mm, 150mm 225mm and 300mm.
Stainless steel hinged gratings for attaching directly to the pipe. So arranged to prevent entry of small animals but able to open outwards to prevent any blockage from debris coming down the pipe. Easily fitted with single stainless steel nut and bolt. Suitable for all types of pipe. Detailed instructions issued with each order.