Polypipe Polypropylene Square Cover 460mm & 65mm Deep Frame is suitable for using with the UG440 Inspection Chamber. It has a deeper frame so can be used within a block paved area. The cover features a anti-slip tread pattern with a cast iron effect. It is rated to A+ so can be used with light vehicular traffic on domestic drives. It has an O ring seal and fixing screws with a removable 350mm restrictor fin for depths greater than 1.2m.