Replacement Parts for Matala® Hakko Linear Diaphragm Air Pumps Flow Rate at 15 Feet of Head_5850 GPH 8pc set for HK 150L ~250L Dimensions 21 W x 8pc set for HK 150L ~250L Model Compressor Diffuser Tubing Type Tubing Length Cabinet Voltage PA50 RV33 (2)QS2 1 2" Poly 200' 115 V PA502 RV33 (2)QS2 1 2" Poly 200' 230V PA50W RV33 (2)QS2 1 2" Quick Sink 200' 115 V PA50W2 RV33 (2)QS2 1 2" Quick Sink 200' 230 V PA50A RV33 (2)QS2 115 V PA50A2 RV33 (2)QS2 230V PA50WLD RV33 1 2" Quick Sink 115 V PA50WLD2 RV33 1 2" Quick Sink 230 V HK M40 Replacement Magnet for HK 40 (1 piece) HK M60 80 Replacement Magnet for HK 60 80 (1 piece) HK M80H Replacement Magnet for HK 80H (1 piece) HK M100 150 Replacement Magnet for HK 100 150 (1 piece) HK M120 120H 200 Replacement Magnet for HK 120 120H 150 (1 piece) HK M250 Replacement Magnet for HK 250 (1 piece) Note regarding magnets: HK M25 Replacement Magnet for HK 25 (1 piece) The magnet is the part that moves back and forth between the diaphragms