The ALM Manufacturing RCJ7Y Spark Plug is suitable for many Einhell petrol brush cutters, chainsaws, garden vacuums, grass trimmers, hedge trimmers and other small engines including: GH-BC 25 AS (34.019.53), GH-BC 30/1GH-BC 43 AS (34.019.73) and GH-PT 2538 AS (34.018.50). Note ALM RCJ7Y is printed with ALM 7 on the spark plug. Compares to: Autolite: 2974, 2984, XST2974.Bosch: WSR6F.Brisk: PR15Y.Champion: RCJ6Y, RCJ7Y, stk 852.Denso: W20MP-U, W22MPR-U, stk 6023. Einhell: 340186501134.General Motors: 5613726. Iskra: FSC75CPR. Motorcraft: A22NX, stk 107. NGK: BPMR6A, BPMR7A, stk 107. Torch: L6RTC, L7RTC, L8RTC, L8RTF.