For hot water, beverages and photographic developers. Locks open for continuous pouring. Black polypropylene body, ethylene propylene washers, nylon handle and stem, 316 S. S. spring. Silicone seating cup, except #16486 which has an ethylene propylene seat cup. 16485 has 5/8- 18 UNF, 1-1/4" long, flow rate of .85 gal/minute. 16486 has 3/8-18 NPSM, 1-11/32" long, flow rate of 1.66 gal/minute. Both have two washers and plastic jam nut. 16489 has 3/8-18 NPT, but no washer, 7/16" long, flow rate of .85 gal/min. Spigot Components meet FDA and NSF standards.