Overview Reviews Product Description Mild steel steel construction. 20" Manway 6" Neck 6 Wing Nut Lid 1/4" Base Have questions? Call us at 877-445-5511 Product Videos Custom Field Product Reviews Write a Review Write a Review × 20" Manway w 6" Neck (5 or 6 Wing Nut) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *