... : Infusorial-earth-braced filter boardModel: Scp-111, Scp-112, Scp-113k, Scp-114 Use: to form a complete set with board frame ... filters to play a bracing role for filter medium such as infusorial earth. Mainly to be ... , 60*122, 100*200, 40*40, 30*30Welcome to contact with us.