4" Plastic inline sand trap (PRO 100P), D ClassVodalands 4 PRO plastic sand trap has a 4 internal width (6 external), 14 depth, and a 1. 64ft (0. 5 meter) length. The sand trap comes with a D class ductile cast iron grate and steel reinforcing on the sides. Can handle commercial vehicle loads. Each trap will come with 2 adapters on each end to keep the units closed or allow for channel connection. Also allows for connection with 4 and 6 piping. Common applications: warehouses, commercial parking,