Don't know how to choose the correct Weber Genesis grill parts

LD325SBPSS

1 hot rod ignitor

For use with The Gourmet BBQ System Griddle

810-7500-S

Grill Cover 55 W x 23 D x 42 H for 3 to 4 Burner Gas Grills VGKSS-CC2 Don't know how to chooseFits most grills with 3 to 4 burners, from 47 and 53width, like weber, Jenn Air, Holland, Brinkmann, Char Broil, MASTER COOK, Cuisinart, Royal Gourmet, Thermos, RevoAce, Kenmore, Generic, Dyna Glo, KitchenAid, Megamaster, Broil King, Napoleon Monument Grills, Huntington, Master Forge, Chargriller, Sonoma, BBQ PRO, DCS. Fits Dyna Glo Grill Models: DGF350CSP, DGF350CSP D, DGC310CNP, DGH373CRP D, DGF371CRP D, DGC310RNP D, DGC310BNP D, DGG424RNP D,