4L310 V-Belt, Outside Length 31 in/ ANGLE IN DEG: 40.0 ENVIRONMENTAL PROTECTION: OIL RESISTANT AND HEAT RESISTANT AND STATIC FREE STRENGTHENING FEATURE: SYNTHETIC CORD END ITEM IDENTIFICATION: HELICOPTER, USCG SEARCH AND RESCUE, HH-60J; AIR COMPRESSORS, HIGH PRESSURE; SYSTEM, 02N2; HELICOPTER, SEARCH AND RESCUE, HH-60H; SPRUANCE CLASS DD (963); FORRESTAL CLASS CV; LOS ANGELES CLASS SSN (688); TICONDEROGA CLASS CG (47); HELICOPTER, CARRIER BASED ASW, SH-60F; FMS-BUILD FRIGATES CLASS SHIPS PERFORMANCE TYPE: LIGHT DUTY CROSS-SECTIONAL SIZE: 4L NOMINAL WIDTH: 0.500 INCHES NOMINAL EFFECTIVE OUTSIDE LENGTH: 31.000 INCHES MATERIAL: FIBER BODY AND RUBBER AND FIBER SYNTHETIC OR RUBBER NATURAL STYLE DESIGNATOR: A12 PLAIN, COG OR NOTCHED