SECONDNATURE WHISPER,SUPRA, & CHALLENGER AIRPUMP REPLACEMENT PARTS.This WILL NOT fit the newer model Tetra pumps. If your air pump does not look like the one in the picture, it will not fit.REPLACE DIRTY AIR FILTERS FOR MAXIMUM AIR FLOW.AIR FILTERS AVAILABLE FOR: WHISPER 100/200/300/400/500/600/650/700/800/900/950/1000, SUPRA MODEL 1,2,3,4.COMPLETE KITS INCLUDE DIAPHRAGM, FLAPPERS, AIR FILTER, AND OTHER PARTS.COMPLETE KITS AVAILABLE FOR: CHALLENGERIII, WHISPER 100/200, SUPRA MODEL 1,2,3DIAPHRAGM & AIR FILTER SETS ARE SOLD ONE PAIR EACH TYPE, SOME AIR PUMPS WILL REQUIRE 2 SETS.DIAPHRAGM & AIR FILTER SETS ARE AVAILABLE FOR: WHISPER 100/200, SUPRA MODEL 1,2,3,4BRAN NEW OLD STOCK.Powered by eCRATER . List your items fast and easy and manage your active items. Powered by eCRATER . List your items fast and easy and manage your active items.