These circular inspection hatch covers from Barton are manufactured from high-impact polycarbonate and feature a course easy-start thread plus a built-in O ring seal. Available in 3 diameters - 103mm, 130mm and 155mm.
Technical Specifications:
| Size 1 | Size 2 | Size 3 | |
| Aperture Diameter | 103mm | 130mm | 155mm |
| Cutting Diameter | 114mm | 139mm | 165mm |
| Overall Diameter | 145mm | 170mm | 215mm |
| Fastenings Diameter | 4mm | 4mm | 4mm |
| Weight | 84g | 107g | 172g |


