Specification: Proof Load: Identification: Common Use: Comment: Commercial 2,500 lb RW-1, 445 3-ring release systems No. 445 shown Specification: Proof Load/SWL: Identification: Common Use: Comment: Commercial As marked on the link “Mallion Rapide ® ” markings Ram-air canopies, modern round  reserves A. No. 6; B. No. 5; C. No. 4;  D. No. 3.5 Specification: Proof Load: Identification: Common Use: Comment: Commercial 500 lb RW-2 3-ring release systems Bottom riser ring Specification: Proof Load: Identification: Common Use: Comment: 60B4312 (assembly) 5,000 lb As marked Military harnesses A. 60B4313/female  B. 60J4328/male Figure 3-71.  Ring, harness, 3-ring. Figure 3-69.  Link, Rapide$^{®}$. Figure 3-72.  Ring, riser, middle, 3-ring. Figure 3-70.  Release, parachute canopy quick disconnect, Capewell. proven that moly disulfide (MDS) filled nylon is superior  to the other materials and has become the most commonly  used stiffener material. Today, the use of  Lexan$^{®}$ is  primarily in clear windows in pin protector flaps. Stiffeners  should have rounded edges to prevent wear points and to  minimize the ability of lines to half hitch around them.  [Figures 3-80  through  3-84] The term “plastic” used here is a generic term for synthetic  materials. The use of these materials is primarily for  stiffeners in containers. They replace the metal stiffeners  used in military systems. High-density polyethylene (HDPE)  was the first material used followed by Lexan $^{®}$. Time has  Plastics and Synthetics 3-20