4" Plastic inline sand trap (BASE 100P), stainless steel grate "perforated" ADA/Heelproof, A ClassVodalands 4 BASE plastic sand trap has a 4 internal width (6 external), 14 depth, and a 1. 64ft (0. 5 meter) length. The sand trap comes without a grate, and one must be purchased separately. This sand trap can hold any of the 4 Base trench drain grates, and will follow whichever load class the grate it holds follows. Each trap will come with 2 adapters which can either come closed or with a channel connection option. Also allows for connection with 4