Package includes 4pcs replace primer bulbs Size:Bulb Flange diameter: Approx. 0.85"(21.6mm); Bulb Height: Approx. 0.75"(19mm); Bulb Diameter: Approx. 0.725”(18.5mm) Compatible with Stihl 4226 121 2700: BG45 BG46 BG55 BG56 BG65 BG66 BG75 BG85 BG86 BR45 BT45 FC100 FC110 FC55 FC56 FC70 FC75 FC85 FC90 FH75 FR130 FR135 FR85 FS-100FS-110 FS-130 FS-310 FS-38 FS-40 FS-45 FS-46 FS-50 FS-55 FS-56 FS-170 FS-175 FS-80 FS-85 FS-87 FS-90 FT-100 HL-100 HL-45 HL-75 HL-90 HL-95 HS-45 HS-75 HS-80 HS-81 HS-85 HS-86 HT-100 HT-101 HT-130 HT-131 HT-56 HT-70 HT-75 KA-85 KM-100 KM-110 KM-130 KM-55 KM-56 KM-85 KM-90 KR-85 KW-85 MM55 SH-55 SH56 SH85 SH-86 SP-80 SP8. Compatible with Echo: LHB-2100 LHD-1700 LHE-2475 LST-2100 LST-2400 LST-2450. Engine Drill ED-200 ED-2000 EDR-210 EDR-2100 EDR-2400. 3. Power Source Attachement PAS-2000 PAS-2100 PAS-211 PAS-225 PAS-2400 PAS-265 PAS-266. Power Edger PE-200 PE-2000 PE-201 PE-225 PE-2400 PE-265 PE-266 PE-266S PE-310 PE-3100 PE-311. Shred-N-Vac ES-1000 ES-2000 ES-210. Compatible with hometile A01195A, A01195, UP04803, PN 00570025; for Oregon 49-028. Please Verify Your Engine Model And Part Numbers Before Purchasing To Ensure You Receive The Correct Parts Replacement 4 Pack 0057003 Carburetor Primer Bulbs Replacement for Primer Gas Fuel Bulb Pump Bulbs 0057003 0057004 0058001 Echo 12538108660 Hometile A01195A Homelite Echo Stihl Ryobi Poulan Zama