This Is A 30" Replaceable Chainsaw Guide Bar With A 3/8" Pitch .050 Gauge And Uses 98 Drive Link Chain. 

Type: RN,   Mount: HV,   Oregon Mount: D009

It Replaces Oregon Guide Bar Number 300RNDD009.

This Guide Bar Fits Husqvarna Larger Models: 61, 65, 66, 77, 181, 185, 260,
266, 272, 272XP, 280, 285, 288XP, 298, 365, 371XP, 372XP, 380, 385, 390XP,
395XP, 562XP, 570, 575XP, 576, 2100, 3120XP.

Fits Jonsered Models: 625, 630, 670, 2065, 
2071, 2077, 2083, 2094, 2095, 2165, 2171, 2172, 2186, 2188 And More.

Fits Echo Model: CS-7310.   Fits Dolmar Models: PS6400, PS7300, PS7900, PS9000, PS910.

Fits Makita Models: EA7900PRZ, DCS6401, DCS6421, DCS7301, DCS7901, DCS9000, DCS90.

Fits Dolmar: : PS-6400, PS-6400H, PS-6400W, PS-7300, PS-7300H, PS-7310, PS-7300H, PS-7900, PS-7900W, PS-7910, PS-7900H, PS-7910W, PS-9000, PS-9010, PS-9010F. 

Fits Shindaiwa: (SDK) 550, 575, 577, 680, 695, 757 And  Fits Solo 603, 643, 662, 667, 670, 675, 680, 681, 690, 694 And More.