Specifications include, but are not limited to: 1. Stack Chair – 17 1/2” - The frame shall be formed from a minimum of 16-gauge tubular steel with a crossover design for minimum stress on welded area. All welds to be made of mig method. Solid plastic seat and back double contoured with a large waterfall front edge for comfort. Seat and back to be thermal setting solid plastic made of flour and melamine resin with binder component to assure a hard smooth surface. Must be a minimum of 3/8” thickness for easy handling and stacking a minimum of five (5) high within 50” high area. Lower frame structure shall be a cross-over form by each leg component running continuous and diagonal across to form an x-braced construction as found in the Scholar Craft series #180 or the legs shall be secured below the seat by an x-braced attached to each leg approximately midway between seat and floor as featured in Virco’s #3000 series. Mfg; Scholar Craft #157 series; Virco #3018; Artco Bell #H107 or approved equal. 2. Stool (Adjustable Height) – Frame: Heavy 1 1/8” 16-gauge steel tubing legs swaged to 5/8”. For maximum support and unit integrity, legs are MIG welded to an extraheavy-duty 11-gauge flat 8 ½” square, steel mounting plate positioned under the seat. A 16-gauge tubular-steel foot-ring, positioned for comfort and stability, surround the legs for additional strength. All parts have a bright nickel-chromed finish. Seat: 12 ¾” diameter, 5/8” thick Melamine Resin solid-plastic attached with four self-tapping screws through the steel mounting plate and into the underside of the solid-plastic. There is no exposed hardware on the seating surface. Glides: Four adjustable one-inch minimum diameter hard-carbon-steel chrome-plated rubber cushioned silent swivels – nylon base type with a flat bottom. Heights: Adjustable Heights from 18” to 30”. Mfg., Scholar Craft 300 series; Artco Bell #0804 or approved equal. 3. Flex Seating Stools (Adjustable Height) – Seat Diameter 11” Base Diameter 13.75” Seat/Base Material Durable and recyclable HDPE #2 plastic Piston Ring operated, Non-rotating pneumatic cylinder Chrome finish Max load weight 280 Lbs (127 kg)Mfg., Heights: Adjustable Heights from 15.5” to 21”. KORE Kids Adjustable Wobble Chair or approved equal.