ELASTOMER SEAL RING KITS FOR AN/PRC77 RADIO $55.00 ELASTOMER SEAL RING KITS FOR AN/PRC77 RADIO quantity Add to cart Category: SEAL RING KITS FOR AN/PRC 77 RADIO Description Description six pieces seal you kits for AN/PRC77 radio, improving radio’s dust and moisture intrusion capability. Newly developed parts to replace old and obsolete seal rings in 77 radio.