M3CS4 – Coupler set, shug 4", M3CS4A – Coupler set, shug 4" – Anodized, M3CSX4 – Coupler set, shug 4" – CAST, M3CSX4A – Coupler set, shug 4" – CAST, anodized, M3CSX4HD – Coupler set, shug 4" – CAST, HD segments, M3CSX4HDA – Coupler set, shug 4" – CAST, HD segments, anodized, M3CSX4S – Coupler set, shug 4" – CAST, SHDS clamp, M3CSX4SA – Coupler set, shug 4" – CAST, SHDS clamp, anodized, M3CSX4HDSA – Coupler set, shug 4" – CAST, SHDS clamp, HD segments, anodized, M3CS4HD – Coupler set, shug 4" – HD segments, M3CS4HDA – Coupler set, shug 4" – HD segments, anodized, M3CS4S – Coupler set, shug 4" – SHDS clamp, M3CS4SA – Coupler set, shug 4" – SHDS clamp, anodized, M3CS4HDS – Coupler set, shug 4" – SHDS clamp, HD segments, M3CSX4HDS – Coupler set, shug 4" – SHDS clamp, HD segments, M3CS4HDSA – Coupler set, shug 4" – SHDS clamp, HD segments, anodized