Features (KSJT series coupler): 1) Cam-and-groove style coupling for special application 2) Anodized aluminum with brass cam locks 3) Heat treated, aluminum alloy body and brass probe 4) Forged bronze cams and stainless steel pins 5) Other sizes available 6) Ordering specifications: a) Products: KSJT-403, 404 b) Male: 3", 4" c) Female: 4", 4" Features (JDKJ series gravity couplers): 1) Optimizes the connection between 4" API adaptors and a 4" hose connection, ensuring safe, fast unloads 2) Has been redesigned with an interior lip that makes hook-ups easier 3) Lip in the 12-oclock position centers coupler with API adaptor for solid connection 4) Easier for operator to handle 5) Available in male adaptor and female coupler configurations 6) Available with either KAMLOK coupler or NPT female threads at the hose connection 7) Mates with standard 4" API RP-1004 tank truck adaptors 8) Aluminum body with buna-N seals 9) Available with viton seals 10) Hose connection end angled at 15o downward for improved drainage 11) Slotted cam arms for tamper-proof applications 12) Rugged chrome plated chains and heavy duty lugs for durability 13) Ordering specifications: a) JDKJ-801: male cam and groove, 3.00", 76.2mm, 4.00 lbs, 1.81kg b) JDKJ-802: male cam and groove, 4.00", 101.6mm, 5.00 lbs, 2.27kg c) JDKJ-803: male-NPT thread, 3.00", 76.2mm, 4.00 lbs, 1.81kg d) JDKJ-804: male-BSP thread, 3.00", 76.2mm, 4.00 lbs, 1.81kg e) JDKJ-805: male-NPT thread, 4.00", 101.6mm, 4.31 lbs, 1.96kg f) JDKJ-806: male-BSP thread, 4.00", 101.6mm, 4.31 lbs, 1.96kg