PLASTIMO Flexible, light and form-fitting, these tanks use a PVC bladder inside a tough, abrasion-resistant nylon outer envelope. Maintenance is easy because the inner bladder can be removed for cleaning and inspection. The bladder is slightly oversized so pressure is exerted on its nylon shell, rather than on the heat-welded seams. 1 1/2" 90 deg fill and 1/2" straight outlet fittings ready to install. Material: PVC/nylon. Port Sizes: 1-1/2 inch 90 deg fill, 1/2 inch straight outlet. Vent: No. Fitting Type: 90 deg hose barb, rotates 360 deg. 52gal. Flexible Water Tank, 27-1/2 inch x 68-1/4 inch