The Betts 8355SCW-10 is a 20-inch steel full opening manhole designed for tank trailer applications. This model features 6 threaded hold-downs and a 10-inch high steel collar with 50 PSI maximum allowable working pressure. The manhole provides a full 20-inch opening for safe tank entrance during inspection or cleaning operations. Constructed from mild steel, this non-ASME code manhole is fabricated for greater strength while maintaining reduced weight compared to conventional designs.