879P and 879DW, 882G and 884G, 882K and 884K, 882SB and 884SB 879P — fiberglass (plain) 879DW — Fiberglass (with drop warp), Also available with PSA backing Construction: Woven 882G — Fiberglass, 884G — Silica Construction: Twisted 882K — Fiberglass, 884K — Silica Construction: Knitted 882SB — Fiberglass, 884SB — Silica Construction: Square braid