AISI 304 Stainless Steel Shield AISI Stainless Steel Clamps and Screw Housing: Full size 9/16" wide bands and one piece screw housings are mechanically interlocked for strength. The wide clamp band provides enhanced sealing force. Specially Beaded Gasket: Unique beaded Neoprene gasket grips with superior holding and sealing power. Gasket conforms to ASTM C 564. Husky SD-2000 Couplings: meet ASTM C 1277 and meet test criteria of CISPI 310.