 Altered Fabric Placement: Controlled fabric placement decreases tensile loading to further reduce stress. An additional benefit attributed to this fabric placement technique is increased abrasion resistance. Wilden Models: M4 Metal and Champ, M8 Metal,Stallion and Champ, M15 Metal, M20 Metal. Diaphragm Materials: Buna, Nordel, Neoprene, Viton |