SaferCCTV(TM) Replace Snap In Primer Bulb for Pouland Homelite Sears Craftsman Echo Weed Eater Ryobi McCulloch Brush (Pack of 2) 1. Professional after-sales service - We do offer a 60-days money-back guarantee on all orders to allow you to test the product 2. Fit Carburetors that are with the snap in primer assembly for Pouland, Homelite, Sears, Craftsman, Echo, Weed Eater, Ryobi, McCulloch, Brush brands, do not fit Toro trimmer 3. For Craftsman Ryobi UP04033 300780004 300780001, Poulan 35879158 35879558 35879898 3587952 35879556 35879516 3587958 35879518, Homelite: HLT28 ST145 ST155 CS50 CS4018 CS5020 D4150B D450B D4550BC CS40 4.Fits for Walbro Poulan: P4018AV-BH, P4018WM ,P4018WT, P4018WTL, PP3516, Pro: PP3516AVX, PP3816, PP3816AV, PP4018, Pro PP4018, Pro PP4218, PP4218AV, PP4218AVHD Gas Saw and so on 5. Replace MTD 791-683974B,Ryobi 683974B, Oregon 49-088-0,Bin number 188-512. Refer to part numbers 01183, UP04033, 300780001, 300780002 & 300780004( Please note: If you are not sure is it fit your part, please check description or send email to us)