Details:* Piston rings are a great replacement for Stihl FS45 FS75 FS80 FS85* Replaces part number: 4137 034 3000* Replaces other models: for Stihl BG45, BG46, BG55, BG65, BG75, BG85, BR45 C, BT45, FC55, FC75, FC85, FH75, FR85, FR85 T, FS38, FS45 C, FS45 L, FS46, FS46 C, FS55, FS55 C, FS55 R, FS55 RC, FS55 T, FS80R, FS85R, FS85 RX, FS85 T, HL45, HL75, HL75 K, HS45, HS75, HS80, HS81 R, HS81 RC, HS81 T, HS81 TC, HS85, HS86 R, HS86 T, HT70, HT75, KA85 R, KM55, KM55C, KM55 R, KM55 RC, KM85, KM85 R, KR85, KW85, MM55, MM55 C, SH55, SH85, SP80, SP80 K, SP81, SP85, SP85 K* Good work, easy installation.* Item Condition: * Color: As Pictures Show* Diameter: 34mm* Thickness: 1.5mm Package Contents:4 * Piston RingsNotes:The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.