Gully traps are produced in antishock PVC, ABS, and PP in sizes ranging from 100 to 300 mm. First Plast also produces a series of technical products for special applications such as corner and balcony gully traps with adjustable outlet for flat roofs, roof gardens and sleeves. For modern installations it is also available a new line of technical gully traps provided with liquid sheath support net, universal flange and non-woven fabric.