Coupling CPT 32/20 CPT 36/20 coupling Coupling CPT 28/16 Coupling CPT 36/32 Coupling CPT 28/25 Coupling CPT 36/16 Coupling CPT 32/28 Coupling CPT 18/16 Coupling CPT 28/22 Coupling CPT 40/36 Coupling CPT 40/32 Coupling CPT 20/16 Coupling CPT 22/18 Coupling CPT 28/18 CPT 22/20 coupling Coupling CPT 36/25 Coupling CPT 40/16 Coupling CPT 40/22 Coupling CPT 40/28