Large-Diameter Gas Lens Compatible with Model 20 20F 20H-320-25R 20HP 20P 301251 301253 9 9F 9FVB 9HP 9P 9V 9VB CS310A HW-20 HW-20R HW-25 HW-9 HW-9F HW-9R PTA-9 PTA-9F PTW-20 WP-20 WP-20P WP-20V WP-25 WP-9 WP-9F WP-9FV WP-9V WP-R9F WP-R9FV Compatible with Series 20 20H-320 20P 9 A-125 HW-20 HW-25 HW-9 PTA-9 PTW-20 W-200 W-225 W-250 W-280 W-310 W-375 For Maximum Electrode Diameter 0.04 in Type Large Diameter Gas Lens