Oregon 55-9842817,2818,, Heavy Duty Trimmer Head Pro Bump And Feed / 55-983 Adapter Included: 7Mm X 1.00 Lhm8Mm X 1.25 Lhm10Mm X 1.25 Lhf Fits Models:, Echo Srm Series: 140,200,202,210,220,230,250,251,260,261,265,280,300,302,303,311,330,340,343,350,400,402,500,501,1500,1501,2010,2090,2100,2110,2200,2201,2300,2301,2400,2410,2450,2500,2501,2502,2510,2530,2601,3000,3001,3010,3100,3110,3400,3410,3500,3550,3800,4600, Husqvarna 24R(Up To Ser 603702)(Up To 86)16R, 22R, 24R, 25Rl122L, 125L, 225L, 225Ld, 225R, 225Rd,225Rj, 227Ld, 232L, 232R, 322L, 322R,324Lx, 325Lx/Rx, 326Ls/Lx, 335Ls, Homelite Hk-24 (To 1/V86),Hk30(After 1/1/86), Hk33 (To 1/1/86)Hbc40, Pbc3800, Pbc4000,Pmb52, Hbc48Jonsered Bp40, Bp40Combi, Bp2040, Br400,Br420, Br450, Br460, Br480, Br500,Tiger 40, Gt21L, Gt22L, Gt24L,Gr26Combi, Gr26D, Gr26L, Gr32L,Gr2026Cl, Gr2026D, Lr200, Lr220,Lr260, Lr320, Lr400, Lr420, Lr450, Lr460Rs44, Gr44, Gr41, J40D,Kq20/30 (Euro), Maruyama Bc220Dl, Bc221Dl, Bc184, Bc184C,Bc200, Bc201, Bc230, Bc241,Bc260, Bc260H, Bc310, Bc320,Bc320H, Bc326, Bc340Dl, Bc402,Bc420H, Bc500, Bc500H, Bc2300,Bc2321, Bc2600, Bc3021, Bc3200,Bc4200H, Bcl2550, Bcgx22, Bcgx31, Bcl2250,Bc184C, Bc200C, Bc260Cmcculloch Mac 22/23/30A, Supermac 30Av,Ms33, Delta, 38Av, Ms40, Bp30Av,Td2400/3300/4000Promac Series: Iii, Iiisup, Ivsupproscaper; Series: 28S, 32H,32Hds, Iii Iv, V, Is, Ii, Iihd, Sebic,Supmac100A; Ps1, Ps2, Ps3, Ps4,Ps5, Sebiv; Eb Series: Iii, Ivsl, 3,4,3Sx, 32Bcs, 35L, 280,282,285Bcs,297Bcs, 325Bc, 327Bc, 2815,28162817,2818,Red Max Bc220Dl, Bc221Dl, Bc300Dl,Bc2300Dl, Bk235Fl, Bk345Fl,Bk435Fl, Bk530Dl, Bc17, Bc23, Bc32,Bc240Dl, Bc260Dl, Bc261Dl, Bc262Dl,Bc340Dl, Bc341Dl, Bc342Dl,Bc2600Dl, Bc430Dwm,Bc440Dwm, Bk346Fl, Bk245Flk,Bk436Fl, Bc245A, Bc260Dm/Dmu,Bc340Dwm/Fw, Bc431Dwm,Bcd20, Bcf01, Bc2601S, Bc3400Dw,Bc4400Dw, Bcx2600Ds, Bcz2500S/Su/Sw, Shindaiwa T195, T220, T222, T230, T230S,T242, T242X, T2510, T2510Xt260, T261, T261 B/Xr/Xb, T272,T272X, T282, T282X, T300,T3410, T3410Xstihl Fs50, Fs51, Fs55, Fs60, Fs61, Fs65,Fs80, Fs83, Fs85, Fs86, Fs90, Fs91, Fs96 for Straight Shaft Trimmers.Works for Single Or Dual Line Indexing.Large Capacity Will Hold Up To 40 Feet Of 0.095 Line.