450mm dia. Polypropylene Chamber with 5 x 110mm flexible inlets, each allowing 10? movement in any direction. Use with Chamber Cover and Frame (Quote 50785) or improved Screw Down Chamber Cover & Frame (Quote 78458). Can take loadings up to a maximum of 35KN (3.5 tonne). Specifications: 450mm internal diameter. For depths up to 1.2m, use risers (Quote 57228) and Screw Down Cover and Frame (Quote 78458). Please ensure sealing rings are used in conjunction with each riser section (Quote 23863).