PRODUCT FEATURES External Thread and nut are left hand threads. Internal Thread is FPT. For use with tanks having a wall thickness of 1/16” to 1/2”.Material:• Body and Nut are Polypropylene• Friction washer is Polyethylene• Sealing washer is EPDM Reviews Featured Products Polypropylene Nipple $1.22 Choose Options Polypropylene Straight Adapters Starting at $1.26 Choose Options Polypropylene Check Valve $14.03 Add to Cart Polypropylene Tee 1/2" $2.00 $5.42 Add to Cart